sigh007 发表于 2012-3-26 13:34:29

MIL-T-24634


                   MIL-T-24634, MILITARY SPECIFICATION: TREAD, COMPOUND FILLED, FOR INCLINED LADDERS (25 JUL 1984)., This specification covers full treads and cap treads which have slip-resistant compound-filled dovetail grooves in extruded aluminum bases.         
         
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