Then wrap the inlet pipes with Teflon tape to ensure a watertight seal.

用生料带缠绕进水管，以保证密封不漏水。

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Watertight seal door is set on the dock and there is waterway out of the door.

该土坞设有止水密封坞门，该门外设航道。

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Manufactured from stainless steel, its welded construction provides a watertight seal.

由不锈钢制造，其焊接施工提供了防水密封。

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The Federal Reserve Bank of New York's gold vault, for example, is located in bunkers 80 feet below its headquarters on Maiden Lane in Lower Manhattan, and is protected by an airtight and watertight seal.

WSJ: Wall Street Braces for a