Waterproofing materials in the construction of the protection and leakage after maintenance is also a difficult problem, after any part of the penetrability of the damage.

防水卷材在施工后的保护和漏水后的维修亦是难题，任何部位的贯穿性破损。

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Grouting technology is used in subsea and river-crossing tunnels for various purposes such as waterproofing, pre-reinforcement and corrosion protection.

作为防水、防腐和地基加固等多种目的和手段之一，灌浆技术可应用于河底隧道或者海底隧道。

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The circuit boards are coated in hard resin and padded with foam for protection and waterproofing within the fabric.

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