... non-return flap valve 止回瓣阀 non-return valve seat 止回阀座 exhaust non-return valve 排气止回阀 ...
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non-return valve seat
止回阀座
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The sealing sections of non-return valve ball seat were separated, material was changed into zirconium oxide ceramic, 0.
通过分离单向阀球座密封段，材料改为氧化锆陶瓷，密封段流道直径增加0。
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