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密封紧密

密封紧密

密封紧密

密封紧密

1

We found the air as carefully excluded from the two bedrooms as if air were fatal to life .

我后发觉这两间屋子都密封紧密，好象透了风就要没命似的。

2

If it slowly drops and does not run out through Test Cock No. 2 , then No. 2 ball valve has a small leak , but No. 1 check valve is tight .

如果水柱慢慢下降，并且没有从测试旋塞 2 号流出，则 2 号球阀有点泄漏，但是 1 号止回阀密封紧密。

3

Requirement : Valve must be tight against reverse flow .

要求：这种阀门对于回流必须密封紧密。

4

If it does not drop , but there is slow leakage at test cock No. 3 , then No. 1 ball valve has a small leak, but No. 2 check valve is tight .

如果水柱没有下降，但是测试旋塞 3 号有点泄漏，则 1 号球阀有点泄漏，但是 2 号止回阀密封紧密。

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