【C12】A．meltingB．shapingC．wieldingD．welding

When the bearing becomes dry from lack of oil, the motor shaft may heat to ______ an extent ______ it welds itself to the bearing.

【C12】A．subjectB．subjectiveC．objectsD．objectives

【C12】A．outwardB．apartC．asideD．outside

【C12】A．attentionB．noticeC．interestD．attraction

The internal part of boiler should be welded by yard if found _____.A.sealedB.crackedC.sha

No fasteners will be used in bullding A3 × × because all components will be welded togeth