This article describes the selection of constituent materials and the choice of mix design for C50 floor, as well as its supply, transportation, vibration, consolidation, curing and quality control.

介绍了寒冷地区C50砼地面的原材料选择，配合比选定，砼供应及运输、浇捣、养护及质量控制。

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Proper quality control of materials and inspections, as required by the Department of Transportation (DOT), lessen the probability of cylinder leaks.

正如交通部所要求的那样，材料的正确质量控制和检查降低了钢瓶泄漏的概率。

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So the analysis on the quality control points of enterprise has become the key of improving the service quality of transportation enterprises and increasing the occupancy of the transportation market.

因此，分析企业质量控制点，成为当前运输企业提高服务质量和运输市场占有率的关键。

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It has been weakened by increasing shipping and transportation costs, quality control issues and a surplus of available, skilled American workers.

FORBES: Magazine Article

Once they factor in rising shipping and transportation costs, the addition of increased quality control and the management of unreliable fulfillment dates, they may find that they're not actually saving any money.

FORBES: Magazine Article