对于关键场合，一个套环和双填料可以提供无泄漏连接。

For critical service a lantern ring and double packing can be provided with a leak-off connection.

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对于关键场合，一个套环和双填料可以提供无泄漏连接。

For critical service a lantern ring and double packing can be provided with a leak-off connection.

youdao