镗工在镗床上根据划线工所划的加工线进行加工，是镗削加工中常用的方法。

工件镗削加工结束，镗工应对工件进行（）。

铣削应用于平面、斜面、曲面、成型面、（）、沟槽和螺旋槽等加工

矩形外螺纹的退刀槽应小于螺纹的螺距。

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

退刀槽尺寸标注：2×1，表示（）。

退刀槽的尺寸标注：2×1，表示（）。

常用沟槽断面形式有直槽、梯形槽、混合槽等。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。