Composite sealing layer is a combination of connected gravel layer, gravel layer sealing systems, and Micro-surfacing (Slurry seal) system.

复合封层是碎石联结层、碎石封层系统和微表处(稀浆封层)系统的结合。

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Composite sealing layer is a combination of connected gravel layer, gravel layer sealing systems, and Micro-surfacing (Slurry seal) system.

复合封层是碎石联结层、碎石封层系统和微表处(稀浆封层)系统的结合。

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