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日本“海基斯特”(ヘキスト)公司的陶瓷部门,开发了以氮化硅为主要成分成本低的制造方法,制造要求很严的汽车发动机用陶瓷进、排气门。
The ceramics division of Japan’s “Sea-kist” company has developed a manufacturing method that uses silicon nitride as a main component at a low cost and manufactures very demanding ceramic intake and exhaust valves for automotive engines.