clear zone zone

the alternative occurrence of fractured zone and non-fractured zone

trade-wind zone [= zone of trade wind]

zone by zone upgoing

Acoustic Fuse

aluminum sheathed detonating fuse

ammunition fuse

autodestructive fuse

auxiliary fuse

backup fuse

bickford fuse

bimetal-fuse

bimetallic fuse

Blasting Fuse

blown fuse indicator

bridge fuse

cap and fuse blasting

cap and fuse firing

capped fuse

carbon tetrachloride fuse