Adjustable shoulder straps have an ergonomic design and superior dual density foam padding for ultimate comfort and breathable mesh.

可调节的肩带有一个符合人体工程学设计，为最终的舒适性和透气网和优越的双密度泡沫填充。

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As an example of multi-motor synchronized driving system, the mechanical structure of a dual-motor synchronized driving system and the mesh relations between gears are studied.

以双电机同步联动伺服系统为例，研究了多电机同步联动系统的机械结构以及齿轮间的啮合关系。

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In this paper is advanced a new type of collimator-dual sieve-mesh collimator.

提出了一种新型的准直器——双筛孔式准直器。

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