The belts have a light weight single layer construction and are positively driven by sprockets.

乙型网带具有单层结构，较轻，使用链轮驱动。

youdao

One of reasons for it is that graduation of manganese sand is not rational, which leads to partial confusion of filter layer construction.

分析原因：工艺改造时所选的锰砂有部分粒径不符合要求，导致级配不合理，造成滤层结构部分混乱；

youdao

Conventional unbonded flexible pipe designs are a multi-layer construction based upon a thermoplastic pipe liner reinforced with metallic materials.

常规的无粘结柔性管采用的是多层构造，主要为金属材料增强的热塑性管道衬里。

youdao

The open-cage printer will work using "fused filament fabrication" with 1.75mm filament, and will also feature 100 micron layer resolution (0.1 millimeter), rigid aluminum construction, an open-source software tool chain and optional heated build platform.

ENGADGET

The anodized shell is tightly beveled -- almost to the point of being too sharp-- while the screen is raised slightly above the rest of the construction (a relief, then, that there's a layer of Gorilla Glass shielding it).

ENGADGET: HTC One V review Mobile