The working surface must be nonabsorbent and smooth.

画布应该是光滑的和不吸水的。

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The working surface of gravity paddy separators is a double tilt surface of reciprocating vibration.

重力谷糙分离机的工作面是往复振动的双向倾斜面。

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Bearing contact fatigue failure of the working surface by means of alternating the role of stress arising from failure.

接触疲劳失效系指轴承工作表面受到交变应力的作用而产生失效。

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Hurlock is an Air Force employee working at Naval Surface Warfare Center Dahlgren.

FORBES: Unionized Air Force Employee Calls Officer "Ignorant," Keeps Job

Thames Water has also been working on a surface water sewer main in the street.

BBC: Reading Friar Street cracked road surface

But a state highway spokesman says they were only working on the surface of the road, not the underlying structure.

NPR: Minn. Bridge Work Focused on Road Surface