replaceable valve seat needle valve
Replaceable valve seat needle valve 可换阀座针阀 Replaceable valve seat needle valve 可换阀座针阀 Micro Metering Needle valve patent certificate 精密节流阀专利证书 .
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replaceable valve seat needle valve
可更换阀座针形阀
以上为机器翻译结果，长、整句建议使用 人工翻译 。