防止静电的措施有哪几种方法？

A. by the weight (tons) of cargo
B. by the capacity (tons) of vessel
C. by DW of the vessel
D. by the draft of the vessel

A. 创伤后踝关节病变
B. 踝部皮肤感染或伤口
C. 踝关节化脓性、结核性、血友病关节炎
D. 踝部骨肿瘤
E. 体弱或肝肾功能不全者

A. 防爆标准
B. 完好标准
C. 检修
D. 安全规程