单项选择题
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
单项选择题 The oil （） in the discharging water from oil water separator exceeds 15 PPM without alarm, because the coil was burnt out.
单项选择题 The internal part of boiler should be cleaned by yard if found （）.
单项选择题 At normal sea going, we use （） instead of donkey boiler.
