单项选择题
A centrifuge arranged to separate impurities and small amounts of water from oil is known as （）.
A.an oily water separator B.a purifier C.a centrifugal compressor D.a clarifier
单项选择题 A centrifuge arranged to separate two liquids is known as （）.
单项选择题 Emulsification of oil will occur when mixed with （）.
单项选择题 The bilge main is arranged to drain any watertight compartment （） ballast, oil or water tanks and to discharge the contents overboard.
