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M/412
The M412 is the Portuguese licensed copy of the Italian SB-33 minimum-metal AP mine. Once armed, force applied to the pressure plate will cause an internal plunger to be depressed; in turn, a spring below the plunger bears on a T-shaped transfer piece and rotating collar mechanism. A steady application of force will cause the collar to rotate along the transfer piece until a firing pin is able to make contact with the stab-sensitive detonator ass...
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