在某些应用程序中的金属面密封，可能需要保持异物了。
In some applications a metal face-seal may be needed to keep foreign matter out.
密封接触面比一般工业接头的密封接触面复杂得多。
The sealing contact surfaces are much more sophisticated than those of a general, industrial connection.
密封接触面比一般工业接头的密封接触面复杂得多。
The sealing contact surfaces are much more sophisticated than those of a general, industrial connection.
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