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The designation ”schedule 80 extra strong ” refers to ___________. 1. weight of steel plate 2. tensile strength of bolts 3. piping wall thickness 4. tubing bursting strength
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The full torque electric brake on an electric cargo winch functions to ___________. 1. act as a backup brake in the event the mechanical brake should fail 2. automatically hold the load as soon as current to the machine is shut off 3. automatically govern the lowering speed of the load 4. automatically govern the hoisting speed of the load
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