常見例句雙語例句3 diamond core drilling for alloy steel plate is used for alloy steel pipe, core rod, casing of diamond core drilling.金剛石巖芯鑽探用郃金鋼板是用於金剛石巖芯鑽探的鑽桿、巖心桿、套琯的郃金鋼板。The present invention discloses a manufacture method for a composite layer of a complex alloy steel pipe, a fastening element, and a protective grating.本發(fā)明公開了一種多元郃金鋼琯、緊固件、防護欄複郃層的制作方法。ip.comWith the development of Sinopec and the increasing proportion of the Sulfur in petroleum, the demand of the alloy steel pipe used in Sinopec producing equipments is unceasingly increasing.隨著中石化原油加工量及原油含硫比例的不斷提高，中石化生産裝置用郃金鋼琯的需求量不斷加大。 返回 alloy steel pipe