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However, if a grenade was to be used as a fixed booby-trap then an instantaneous fuse would be fitted.
The Canadian Corps paid particular attention to eliminating German barbed wire, a task made easier with the introduction of the No. 106 instantaneous fuse.
It was also possible to connect a pencil detonator to so-called "instantaneous fuse" (not to be confused with detonating cord) which had an unusually fast burn rate of over 10 metres per second.