E21F   1/00		ƻޤϥȥ̵ͥήʬ̵ۡޤ̵ְ̣ƣơˡΣ	Ventilation of mines or tunnels; Distribution of ventilating currents(ventilating rooms or spaces in general <b>F24F</b>)	9905
E21F   1/02		ѥǥʤΤΥʥ׻ǣǣ	Test models(analogue computers therefor <b>G06G7/50</b>)	265
E21F   1/04		ƻʷ֣ţƣ	Air ducts(suspension devices <b>E21F17/02</b>)	3286
E21F   1/06		ƻ³ʴɤ³̣ƣ̡	Duct connections(tube connections in general <b>F16L</b>)	949
E21F   1/08		ƻ³֡㡥դ뤿֡켫Σƣġ	Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators(ventilators <u>per se</u><b>F04D</b>)	4534
E21F   1/10		̵͡ʸͰ̣ţ¡	Air doors(doors in general <b>E06B</b>)	2640
E21F   1/12		̵ͤưŪ˳	Devices for automatically opening air doors	1017
E21F   1/14		̵ڤꡨåʼɣţƣѥåţġˡΣ	Air partitions; Air locks(dams <b>E21F17/103</b>; air locks for foundations <b>E02D</b>)	970
E21F   1/16		ΩƹС	Shaft covers	351
E21F   1/18		ϤˤήʣţƣţƣͥˡΣ	Gravity-flow ventilation(<b>E21F1/02 to E21F1/16</b>  take precedence)	175
E21F   3/00		̵ѤޤϴʶĴޤ϶Ĵְ̣ƣơ	Cooling or drying of air(air-conditioning rooms or spaces in general <b>F24F</b>)	3144
E21F   5/00		ФͽɡǲޤӽФΤ֤ޤˡȯޤϹкҤͽɡʼɣţƣɽ̤ؤαΤޤϤ¾ήΤζ̣£ƻɽǣΡˡΣ	Means or methods for preventing, binding, depositing or removing dust; Preventing explosions or fires(dams <b>E21F17/103</b>; applying liquids or other fluent materials to surfaces in general <b>B05</b>; flue-gas indicators <b>G01N</b>)	8909
E21F   5/02		餷ʮ̸ꤹ뤳Ȥˤ	by wetting or spraying	2830
E21F   5/04		ʮ̸ˤʮ̸˥åץ롤ʮ̸̣£¡£ġήʮ̸Υ֤ĥԥåţã	Spraying barriers(spray nipples, spraying in general <b>B05B</b>, <b>B05D</b>; picks with arrangement of fluid-spraying nozzles <b>E21C35/187</b>)	8831
E21F   5/06		ʮ̸Ѥ	Fluids used for spraying	706
E21F   5/08		ʴۡ¾ɸޤλ	Rock dusting; Depositing other protective substances	524
E21F   5/10		ʴ	Devices for rock dusting	193
E21F   5/12		ʴ۹	Composition of rock dust	47
E21F   5/14		ͽФȯˤޤƱ˺Ѥγޤϴʴ	Fluid barriers or rock dusters made to work by, or at the same time as, shots or explosions	559
E21F   5/16		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 <b>C09K3/22</b>)	141
E21F   5/18		Фǲ뤿αΤ̡ޤΤΤ	Impregnating walls, or the like, with liquids for binding dust	208
E21F   5/20		Фνޤѡʹˡޤ֣ţ£ƩΤΣţãˡΣ	Drawing-off or depositing dust(methods or apparatus for flushing boreholes <b>E21B21/00</b>; while slitting <b>E21C35/22</b>)	4537
E21F   7/00		ñʤ륬ȴΡޤϤΥ򤢤ŪΤ˻Ѥ뤿ΥȴΡˡޤ	Methods or devices for drawing-off gases with or without subsequent use of the gas for any purpose	10241
E21F   9/00		ޤ֤Υѡɻ֡ŵΥѡɻߣȣˡȣˡ	Devices preventing sparking of machines or apparatus(preventing sparking of electric machines or apparatus <b>H01K</b>, <b>H02K</b>)	589
E21F  11/00		߸֤ޤϤ¾ΰ֡㡥ޤϩʼѸƵ۱֣ȣƵ֣£Τˤ׼ԤΤθƵ֣£	Rescue devices or other safety devices, e.g. safety chambers or escape ways(breathing aids for curative purposes <b>A61H31/00</b>; respiratory apparatus <b>A62B7/00</b>; breathing apparatus for accidentally buried persons <b>A62B33/00</b>)	7541
E21F  13/00		ϲξ֤äŬ¡ʹ֣£ġ°̡Ѥߣ£ǡ	Transport specially adapted to underground conditions(mine cars <b>B61D</b>; transport in general, loading <b>B65G</b>)	7429
E21F  13/02		ʿƻ	in galleries	2309
E21F  13/04		йѡ⾮Ωƹޤϼй	in gravity inclines; in staple or inclined shafts	1770
E21F  13/06		ڱ̤ޤڱն	at or adjacent to the working face	3049
E21F  13/08		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 <b>E21C35/12</b>; in combination with mine roof supports for step-by-step movement <b>E21D23/00</b>)	2134
E21F  13/10		٥ηߡΣ	Anchorings for conveyors	378
E21F  15/00		ϲȶ֤ʪŶˡޤ֡ʼɣţƣˡΣ	Methods or devices for placing filling-up materials in underground workings(dams <b>E21F17/103</b>)	6739
E21F  15/02		Ŷλٻʡ㡥	Supporting means, e.g. shuttering, for filling-up materials	1056
E21F  15/04		ŶޥåȡŶ֡ڤ	Stowing mats; Goaf wire netting; Partition walls	1012
E21F  15/06		ŪŶ	Filling-up mechanically	1555
E21F  15/08		ΤޤϵΤˤ뽼ŶʱΤޤϵΤˤ֣£ǡɡɷѤƣ̡	Filling-up hydraulically or pneumatically(hydraulic or pneumatic transport devices <b>B65G</b>; pipes, pipe couplings <b>F16L</b>)	1651
E21F  15/10		ΤޤϵΤˤ뽼Ŷ	Hydraulic or pneumatic filling-up machines	857
E21F  16/00		ӿפδޤϤ¾ϰδΰݻţģˡΣ	Drainage(keeping dry foundation sites or other areas in the ground <b>E02D19/00</b>)	5452
E21F  16/02		ȥͥӿΣ	of tunnels	6673
E21F  17/00		¾°ʤۻޤϥȥͥˤѤˡޤ֡ʹƣȣ¡ˡΣ	Methods or devices for use in mines or tunnels, not covered elsewhere(mine lighting <b>F21</b>, <b>H05B</b>)	14931
E21F  17/02		ɤޤϤʪη֡㡥ѡʴɡ֥롤ݸٻΰ̣ƣ̣ƣ̣	Suspension devices for tubes or the like, e.g. for ventilating ducts(supporting pipes, cables or protective tubing in general <b>F16L3/00 to F16L7/00</b> )	2802
E21F  17/04		ưʬ֡Σ	Distributing means for power supply	168
E21F  17/06		Ϥʬ֡Ƴɡ϶ޤʬѲϩ̣ȣʡ	Distributing electric power; Cable networks; Conduits for cables(circuit arrangements for supplying or distributing electric power in general <b>H02J</b>)	1166
E21F  17/08		ΰϤʬ۴֡۴ɷϰ̣ƣġ	Distributing hydraulic power; Pipe networks for hydraulic liquid(pipe-line systems in general <b>F17D</b>)	255
E21F  17/10		ΰϤʬ۴֡۴ɷϰ̣ƣġ	Distributing pneumatic power; Pipe networks for compressed air(pipe-line systems in general <b>F17D</b>)	224
E21F  17/103		ɡ㡥ѡΣ	Dams, e.g. for ventilation	1896
E21F  17/107		ĥǽʤΡΣ	inflatable	423
E21F  17/12		Ǹ	Dam doors	1744
E21F  17/16		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 <b>B65G5/00</b>)	1556
E21F  17/18		֤üŬѡʥ١졼ޤưƻѣ£¡δ綠켫ΣǣΡ	Special adaptations of signalling or alarm devices(for elevators, escalators or moving walkways <b>B66B</b>; gas-sensitive devices <u>per se</u><b>G01N</b>)	23093
