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單項(xiàng)選擇題

The remaining oil/water mixture now flows down into the fine separating compartment and moves slowly between the（） in the Turbulo separator.

A.catch plates
B.swash plates
C.cover plates
D.bedplates

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單項(xiàng)選擇題

The oil （） in the discharging water from oil water separator exceeds 15 PPM without alarm, because the coil was burnt out.

A.filter
B.hole
C.pollution
D.content

單項(xiàng)選擇題

The internal part of boiler should be cleaned by yard if found （）.

A.scaled
B.worn
C.deformed
D.rested

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