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單項(xiàng)選擇題

Maximum and minimum working temperatures must be considered when choosing the joint, which must be so installed that it is neither over-compressed nor over-extendedThe bold and italic word "which "probably means （）.

A.maximum working temperature
B.minimum working temperature
C.the joint
D.the insulating material

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單項(xiàng)選擇題

Stainless steel is material commonly used for temperatures up to 50℃; beyond that and for severe corrosive conditions other materials are requiredThe bold and italic word “that” probably means （）.

A.stainless steel
B.temperature
C.50℃
D.other materials

單項(xiàng)選擇題

Provision must be made in pipe systems for changes in length due to change of temperatureThe bold and italic word “provision” probably means （）.

A.flanges
B.nuts
C.expansion joints
D.bolts

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