这一层膜对重要区域形成保护密封。
This film ACTS as a protective sealing agent in the vital area.
与大多数涂料保护密封胶密封可以分层为更好的结果。
Unlike most paint protection sealants-Seal can be layered for improved results.
梯形梁延伸到整个大桥，主要是为保护密封焊接空心截面不被腐蚀。
The beam web, which extends over the entire bridge, is built of a trapezoidal, for reasons of corrosion protection hermetically welded hollow section.
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