For it is more sensitive to impact, one of the major concerns in the use of fiber-reinforced composite materials is the damage induced in these materials by foreign object impacts that are expected during manufacture, usage and servicing.
但是,此类复合材料对冲击载荷比较敏感,其在制造、使用和维修过程中受到外来物的低速冲击损伤成为人们关注的主要问题之一。
identify and document products every step of the way from the purchase of supplies and materials through all stages of handling, storage, production, delivery, installation, and servicing.
从购买供应品和材料到所有搬运、储存、生产、交货、安装和投产过程的每一阶段,对产品确定并记录建档。
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