It is widely recognized 1 that the cost of detecting and correcting a defect in the coding phase can be five to ten times higher than the cost of doing so during the requirements development phase.
已经被普遍认识到的是：1在编码阶段检查并修正一个缺陷的成本比需求开发阶段这样做的成本要高五到十倍还不止。
The paper recounts the common defect of the powder electrostatic spraying for surface of aluminium products, analyzes reason and put forward the correcting and precautionary measures.
对铝材表面粉末静电喷涂处理的常见缺陷进行了描述，分析了产生原因，提出了纠正及预防措施。
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