E21F   1/00  \	0	0	2D062	E21F   1/00	20	ƻޤϥȥ̵ͥήʬ̵ۡޤ̵ְ̣ƣơˡΣ	Ventilation of mines or tunnels; Distribution of ventilating currents (ventilating rooms or spaces in general F24F) [2]
E21F   1/00  A	0	0	2D062	E21F   1/00	541	ȥͥ봹	Controlling tunnel ventilation
E21F   1/00  Z	0	0	2D062	E21F   1/00	391	¾Τ	Others
E21F   1/02  \	1	1	2D062	E21F   1/02	3	ѥǥʤΤΥʥ׻ǣǣ	Test models (analogue computers therefor G06G 7/50)
E21F   1/04  \	1	1	2D062	E21F   1/04	83	ƻʷ֣ţƣ	Air ducts (suspension devices E21F 17/02)
E21F   1/06  \	2	2	2D062	E21F   1/06	38	ƻ³ʴɤ³̣ƣ̡	Duct connections (tube connections in general F16L)
E21F   1/08  \	1	1	2D062	E21F   1/08	37	ƻ³֡㡥դ뤿֡켫Σƣġ	Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators (ventilators <u>per se</u>F04D)
E21F   1/10  \	1	1	2D062	E21F   1/10	69	̵͡ʸͰ̣ţ¡	Air doors (doors in general E06B)
E21F   1/12  \	2	2	2D062	E21F   1/12	9	̵ͤưŪ˳	Devices for automatically opening air doors
E21F   1/14  \	1	1	2D062	E21F   1/14	46	̵ڤꡨåʼɣţƣѥåţġˡΣ	Air partitions; Air locks (dams E21F 17/103; air locks for foundations E02D) [6]
E21F   1/16  \	1	1	2D062	E21F   1/16	3	ΩƹС	Shaft covers
E21F   1/18  \	1	1	2D062	E21F   1/18	2	ϤˤήʣţƣţƣͥˡΣ	Gravity-flow ventilation (E21F 1/02-E21F 1/16 take precedence) [2]
E21F   3/00  \	0	0	2D062	E21F   3/00	64	̵ѤޤϴʶĴޤ϶Ĵְ̣ƣơ	Cooling or drying of air (air-conditioning rooms or spaces in general F24F)
E21F   5/00  \	0	0	2D062	E21F   5/00	111	ФͽɡǲޤӽФΤ֤ޤˡȯޤϹкҤͽɡʼɣţƣɽ̤ؤαΤޤϤ¾ήΤζ̣£ƻɽǣΡˡΣ	Means or methods for preventing, binding, depositing or removing dust; Preventing explosions or fires (dams E21F 17/103; applying liquids or other fluent materials to surfaces in general B05; flue-gas indicators G01N) [6]
E21F   5/02  \	1	1	2D062	E21F   5/02	81	餷ʮ̸ꤹ뤳Ȥˤ	by wetting or spraying
E21F   5/04  \	2	2	2D062	E21F   5/04	7	ʮ̸ˤʮ̸˥åץ롤ʮ̸̣£¡£ġήʮ̸Υ֤ĥԥåţã	Spraying barriers (spray nipples, spraying in general B05B, B05D; picks with arrangement of fluid-spraying nozzles E21C 35/187)
E21F   5/06  \	2	2	2D062	E21F   5/06	4	ʮ̸Ѥ	Fluids used for spraying
E21F   5/08  \	1	1	2D062	E21F   5/08	5	ʴۡ¾ɸޤλ	Rock dusting; Depositing other protective substances
E21F   5/10  \	2	2	2D062	E21F   5/10	0	ʴ	Devices for rock dusting
E21F   5/12  \	2	2	2D062	E21F   5/12	1	ʴ۹	Composition of rock dust
E21F   5/14  \	1	1	2D062	E21F   5/14	7	ͽФȯˤޤƱ˺Ѥγޤϴʴ	Fluid barriers or rock dusters made to work by, or at the same time as, shots or explosions
E21F   5/16  \	1	1	2D062	E21F   5/16	4	Фǲ뤿ᾲ̡̤ޤΤΤξ֤줿ۼΤޤϤ¾αءؤѡʿԼۼʪ̣ãˣ	Layers of hygroscopic or other salts deposited on floors, walls, or the like, for binding dust; Deposition of such layers (dust-absorbing materials in general C09K 3/22)
E21F   5/18  \	1	1	2D062	E21F   5/18	5	Фǲ뤿αΤ̡ޤΤΤ	Impregnating walls, or the like, with liquids for binding dust
E21F   5/20  \	1	1	2D062	E21F   5/20	147	Фνޤѡʹˡޤ֣ţ£ƩΤΣţãˡΣ	Drawing-off or depositing dust (methods or apparatus for flushing boreholes E21B 21/00; while slitting E21C 35/22) [1,7]
E21F   7/00  \	0	0	2D062	E21F   7/00	24	ñʤ륬ȴΡޤϤΥ򤢤ŪΤ˻Ѥ뤿ΥȴΡˡޤ	Methods or devices for drawing-off gases with or without subsequent use of the gas for any purpose
E21F   9/00  \	0	0	2D062	E21F   9/00	14	ޤ֤Υѡɻ֡ŵΥѡɻߣȣˡȣˡ	Devices preventing sparking of machines or apparatus (preventing sparking of electric machines or apparatus H01K, H02K)
E21F  11/00  \	0	0	2D062	E21F  11/00	323	߸֤ޤϤ¾ΰ֡㡥ޤϩʼѸƵ۱֣ȣƵ֣£Τˤ׼ԤΤθƵ֣£	Rescue devices or other safety devices, e.g. safety chambers, escape ways (breathing aids for curative purposes A61H 31/00; respiratory apparatus A62B 7/00; revival apparatus A62B 33/00)
E21F  13/00  \	0	0	2D062	E21F  13/00	176	ϲξ֤äŬ¡ʹ֣£ġ°̡Ѥߣ£ǡ	Transport specially adapted to underground conditions (mine cars B61D; transport in general, loading B65G)
E21F  13/02  \	1	1	2D062	E21F  13/02	448	ʿƻ	in galleries
E21F  13/04  \	1	1	2D062	E21F  13/04	76	йѡ⾮Ωƹޤϼй	in gravity inclines; in staple or inclined shafts
E21F  13/06  \	1	1	2D062	E21F  13/06	74	ڱ̤ޤڱն	at or adjacent to the working face
E21F  13/08  \	1	1	2D062	E21F  13/08	88	٥ޤϤ¾αѵڱΰĤξ꤫¾ξذưΡʺηʪѥ٥ˤäƺη⤹ΣţãԻݤȤȤ߹碌ţģ	Shifting conveyors or other transport devices from one location at the working face to another (guiding mining machines along conveyors for the cut mineral E21C 35/12; in combination with mine roof supports for step-by-step movement E21D 23/00)
E21F  13/10  \	1	1	2D062	E21F  13/10	12	٥ηߡΣ	Anchorings for conveyors [2]
E21F  15/00  \	0	0	2D062	E21F  15/00	200	ϲȶ֤ʪŶˡޤ֡ʼɣţƣˡΣ	Methods or devices for placing filling-up materials in underground workings (dams E21F 17/103) [6]
E21F  15/02  \	1	1	2D062	E21F  15/02	8	Ŷλٻʡ㡥	Supporting means, e.g. shuttering, for filling-up materials
E21F  15/04  \	2	2	2D062	E21F  15/04	3	ŶޥåȡŶ֡ڤ	Stowing mats; Goaf wire netting; Partition walls
E21F  15/06  \	1	1	2D062	E21F  15/06	19	ŪŶ	Filling-up mechanically
E21F  15/08  \	1	1	2D062	E21F  15/08	35	ΤޤϵΤˤ뽼ŶʱΤޤϵΤˤ֣£ǡɡɷѤƣ̡	Filling-up hydraulically or pneumatically (hydraulic or pneumatic transport devices B65G; pipes, pipe couplings F16L)
E21F  15/10  \	2	2	2D062	E21F  15/10	3	ΤޤϵΤˤ뽼Ŷ	Hydraulic or pneumatic filling-up machines
E21F  16/00  \	0	0	2D062	E21F  16/00	55	ӿפδޤϤ¾ϰδΰݻţģˡΣ	Drainage (keeping dry foundation sites or other areas in the ground E02D 19/00) [2]
E21F  16/02  \	1	1	2D062	E21F  16/02	431	ȥͥӿΣ	of tunnels [2]
E21F  17/00  \	0	0	2D062	E21F  17/00	618	¾°ʤۻޤϥȥͥˤѤˡޤ֡ʹƣȣ¡ˡΣ	Methods or devices for use in mines or tunnels, not covered elsewhere (mine lighting F21, H05B) [2]
E21F  17/02  \	1	1	2D062	E21F  17/02	90	ɤޤϤʪη֡㡥ѡʴɡ֥롤ݸٻΰ̣ƣ̣ƣ̣	Suspension devices for tubes or the like, e.g. for ventilating ducts (supporting pipes, cables or protective tubing in general F16L 3/00-F16L 7/00)
E21F  17/04  \	1	1	2D062	E21F  17/04	31	ưʬ֡Σ	Distributing means for power supply [2]
E21F  17/06  \	2	2	2D062	E21F  17/06	24	Ϥʬ֡Ƴɡ϶ޤʬѲϩ̣ȣʡ	Distributing electric power; Cable networks; Conduits for cables (circuit arrangements for supplying or distributing electric power in general H02J)
E21F  17/08  \	2	2	2D062	E21F  17/08	3	ΰϤʬ۴֡۴ɷϰ̣ƣġ	Distributing hydraulic power; Pipe networks for hydraulic liquid (pipe-line systems in general F17D)
E21F  17/10  \	2	2	2D062	E21F  17/10	2	ΰϤʬ۴֡۴ɷϰ̣ƣġ	Distributing pneumatic power; Pipe networks for compressed air (pipe-line systems in general F17D)
E21F  17/103  \	1	1	2D062	E21F  17/103	29	ɡ㡥ѡΣ	Dams, e.g. for ventilation [6]
E21F  17/107  \	2	2	2D062	E21F  17/107	14	ĥǽʤΡΣ	inflatable [6]
E21F  17/12  \	2	2	2D062	E21F  17/12	67	Ǹ	Dam doors
E21F  17/16  \	1	1	2D062	E21F  17/16	21	ϩ似򡤤Ȥ˱Τ䵤Τ¢ѤѹΡμޤϿ͹ŪʷޤϼǤή¢£ǣ	Modification of mine passages or chambers for storage purposes, especially for liquids or gases (storing fluids in natural or artificial cavities or chambers in the earth B65G 5/00)
E21F  17/18  \	1	1	2D062	E21F  17/18	235	֤üŬѡʥ١졼ޤưƻѣ£¡δ綠켫ΣǣΡ	Special adaptations of signalling or alarm devices (for elevators, escalators or moving walkways B66B; gas-sensitive devices <u>per se</u>G01N)
