G21J   1/00  \	0	0	2G081	G21J   1/00	4	核爆発装置	Nuclear explosive devices
G21J   3/00  \	0	0	2G081	G21J   3/00	9	核爆発装置の平和利用	Peaceful applications of nuclear explosive devices
G21J   3/02  \	1	1	2G081	G21J   3/02	0	穴掘り用	for excavation
G21J   5/00  \	0	0	2G081	G21J   5/00	9	核爆発の探知装置	Detection arrangements for nuclear explosions
