helmet;topee,crash hat是什么意思

用法例句

Harmfulness of Static Electricity and its Protection during the Process of NF_3 Production;

NF_3生产中静电的危害及其防护

Corrosion and protection of grounding net in electric power system;

电力接地网腐蚀与防护技术的进展

Joint Technique of TA2/316L And Its Corrosion and Protection;

TA2/316L的连接技术及其腐蚀与防护

Corrosion of the first heat echanger of the transformation section analyse and protect;

变换工段热交换器腐蚀分析及防护

The paper mainly discusses electrified human body because of the over-used unprotected-static-elec- tricity materials and how to protect babies and children when they are exposed to much static electricity.

婴儿和儿童在有严重的静电威胁条件下如何进行防护的问题。

Defend of Infect in Hospital for Patient of Windpipe Split;

气管切开患者医院感染的防护

Space defend system for ground military electromagnetic information;

对地面军事电磁信息的天际防护系统

Laser weapon and defense techniques of winged missile;

激光武器及飞航导弹的防护技术

Survival and defense of launch position of ballistic missile;

弹道导弹发射阵地的生存和防护

The Research on A Novel Defense Mechanism of DDoS;

一种针对DDoS攻击的新型防护机制研究