Each layer of the coat is a standard material with low cost.
该涂层的各层是低成本的标准材料。
Each layer of the plate has different material and thickness.
层板各层材料不同，厚度也不同。
A least part of the first layer of fibrous material is densified.
使至少部分的第一层纤维材料致密化。
A bulk layer includes the primary material and is free of the secondary material.
一主体层包含该主要材料而不含该次要材料。
A bulk layer includes the primary material and is free of the secondary material.
一主体层包含该主要材料而不含该次要材料。
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