| http://www.w3.org/ns/prov#value | - pivoted at one end to said frame and having projectile support means fixed to said arm means at the other end; locking means, movablycarried by said. frame, provided with means for releasably engaging and holding said arm means in retracted position relative to said frame; and driving means including one element connecting said arm means and another element connect ing said locking means and, oper
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