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Leather reinforcement protected the duck from the edges of the tool blade. The rounded, webbing-reinforced flap lid of the carrier was fastened closed by means of a round spring socket-and-stud snap fastener rather than the Lift-the-DOT or One-Way-Lift type fasteners used on the M-1943 carrier. Another distinct feature was provision for ...
The two halves of a riveted leather snap fastener. The top half has a groove which "snaps" in place when "pressed" into the bottom half. A snap fastener, also called snap button, press button, [1] press stud, [1] press fastener, dome fastener, popper, snap and tich (or tich button), is a pair of interlocking discs, made out of a metal or plastic, commonly used in place of traditional buttons ...
A team of riggers design and install the lifting or rolling equipment needed to raise, roll, slide or lift objects such as heavy machinery, structural components, building materials, or large-scale fixtures with a crane, hoist or block and tackle. Rigging comes from rig, to set up or prepare.
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A lewis (sometimes called a lewisson) is one of a category of lifting devices used by stonemasons to lift large stones into place with a crane, chain block, or winch. It is inserted into a specially prepared hole, or seating , in the top of a stone, preferably above its centre of mass .
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In 1896, John M. Henderson and Co. introduced the first commercially available Blondin system, which used steel ropes instead of the earlier iron ropes. The first installation at a Welsh slate quarry was a pair of blondins at Pen-yr-Orsedd quarry in 1899. These were powered by stationary steam engines. [5]