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a. Description. The chemical fuze SF 18 (fig. 36) is an instantaneous,
non- metallic, che-mical type designed especially for employment in the
glass mine (par. 97) when that mine is used under water. The fuze is an
integral part of the glass separator palte situated between the glass
pressure plate and the charge of the mine. The fuze is actually a mo-dified
version of the Topfmine fuze SF 1 (par. 30) and
has the same components parts: a glass pressure head with a shear rim
above two vials of chemicals glued to a celluloid disk over a hole.
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