A、Gun tackle
B、Luff tackle
C、Two-fold tackle
D、Double-luff tackle
更多“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?（）.”相关的问题
A、Overcoming sliding friction B、Overcoming rolling friction C、Overcoming fluid friction D、Overcoming oil wedge friction
A、Were there loss of energy by friction B、Since there be loss of energy by friction C、Were there no loss of energy by friction D、Should be no loss of energy by friction
A、the shafting’s vertical vibration B、violent friction and sea water corrosive C、friction and high temperature D、violent friction and high temperature
A、increase compressor discharge pressure on demand B、increase compressor operating speed as necessary C、allow the motor to turn the compressor opposed only by friction D、reduce the compressor frictional load when starting
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