将注塑模具设计成整体式凹模的优点有（）。

简述模具设计人员的常备手册与书籍。

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.

The （） is used for hauling in or letting out the wires or ropes.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

多工序冲裁复合模的凸模进入凹模的深度应以完成（）工序为准。

冲压时落料拉深复合模的拉深凸模应（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

简述塑料壁纸的特点。