单项选择题
A.swaged socket B.thimbled mechanical splice C.hand splice D.spelter poured and resin sockets
Nylon line is better suited than manila for（）.A.Towing ...
单项选择题Nylon line is better suited than manila for（）.
A.Towing alongside B.Towing astern C.Holding knots and splices D.Resisting damage from chemicals
Neglecting friction，you desire to lift a 300 kgs weight...
单项选择题Neglecting friction，you desire to lift a 300 kgs weight with a stress on the hauling part of 100 kgs.Which of the following tackles would you use（）.
A.Gun tackle B.Luff tackle C.Two-fold tackle D.Double-luff tackle
Manila slings should not be used to load（）.A.cottonB.lu...
单项选择题Manila slings should not be used to load（）.
A.cotton B.lumber C.steel D.tires
