在电动工具的具体应用中，聚酰胺是通常用于罩壳的原料，当与零部件设计相结合时，聚酰胺原料在满足结构及防护标准方面扮演了一个非常关键的角色。
In the specific case of power tools, polyamides are used in housings where in combination with part designs they play a critical role in meeting structural and protective criteria.
结合工程实例对长距离输水工程中的系统设计、管材选择、水锤防护等方面进行了阐述。
Combined with engineering example, long distance water conveyance engineering is described from the aspects of system design, choice of tubing and anti-water hammer.
结合实际工作，浅谈了在变电站入侵波的防护方面应当引起注意的问题。
Based on the actual work, the noteworthy problems in invading wave protection of substation are discussed in brief.
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