Containers must be placed and well-sealed in one transparent plastic bag with a press-seal, of a maximum capacity of one liter (quart).

这些东西必须被密封放置在一个有冲压密封圈的，最大容量为一公升（一夸脱）的透明塑料袋中。

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Start stem O-ring seal over stem, then press into position as handle is pressed down over stem.

从阀杆上的阀杆O形环密封开始，然后在手柄安装在阀杆上后，将其压进手柄的位置上。

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The seal ring 34 composes a floating seal and is formed by press working.

密封圈(34)构成浮动密封，通过冲压加工而成型。

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Available from Seal Press, a member of the Perseus Books Group.

FORBES: Magazine Article

For instance, lorries crossing into Manhattan are now subject to stringent checks, and the local press is full of reports on "lockdown" plans which would seal off the island should intelligence suggest another terror attack is imminent.

BBC: Met chief learns NY terror lessons