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。
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。
The sealing sections of non-return valve ball seat were separated, material was changed into zirconium oxide ceramic, 0.
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