Mechanical seal cover 机械压盖 ; [机] 机械密封盖
Mechanical Seal Pump Cover 机封泵盖
mechanical hatch cover 机动舱口盖
A 1924 Time cover story on Baekeland reported that those familiar with Bakelite's potential "claim that in a few years it will be embod-ied in every mechanical facility of modern civilization".
1924年以贝克兰为封面的一期时代杂志的封面人物故事报道说，那些知晓酚醛潜力的人“声称再过几年它就会体现在现代文明的每一个机械设备上”。
Our company cover all construction activities, that is: piling, civil engineering, mechanical erection, piping, electrical, instrumentation, painting and insulation work.
我们公司涉及所有施工活动，包括：打桩、土建工程、机械安装、配管、电气、仪表、油漆和保温绝缘工作。
Tolerances cover dimensional variation and surface-roughness range and also the variation in mechanical properties from heat treatment and other processing operations.
公差这个概念既包括尺寸偏差范围和表 面粗糙度范围， 也包括由热处理和其它处理操 作所引起的机械特性的变化。
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