不同材料、不同铸造方法生产铸件所能得到的最小壁厚不一样，用砂型铸造灰铸铁件时，能获得的最小壁厚为（）。

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。

铸件的质量与其凝固方式密切相关，灰铸铁的凝固倾向于（），易获得密实铸件。

为了防止铸件在铸件产生热应力，在工艺上常采用（）。

对球墨铸铁探伤时，可采用下列哪种方法判断铸件质量（）

由于铸件冷却收缩后包紧在型芯上，内孔脱模斜度>外壁的脱模斜度。（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。