Owing to the modified error in principle, the manufacturing error and the variation of the load, there still exists the mesh impact in the transmission of modified spur gear.

由于存在修形原理误差、齿轮加工误差以及载荷工况的变化，渐开线修形齿轮在使用中仍会有啮合冲击现象。

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The optimal decision depends on different parameters, such as the comparative costs between the different manufacturing process and supply chain as well as the demand variation of customized product.

得到同时提供标准与定制两类产品的企业进行制造流程与供应链选择的决策方法；

youdao

Lots of need to move innovations through design, product development, marketing, derivative designs, prototype production, design for manufacturing, short-run specialty items and even prolific variation creation.

FORBES: Innovation Ain't So Easy Mr. President - Think Google, Not GE