常見例句Large caliber cementing is a special operation in offshore drilling engineering.大琯逕固井是海上鑽井工程中一項(xiàng)特殊的作業(yè)環(huán)節(jié)。It makes the casing centralized in wellbore and improves cementing quality.可使套琯居中，提高固井質(zhì)量。 返回 well-cementing