butterfly spring safety valve 蝶型弹簧安全阀
factor of safety [= safety factor] 安全因素; 安全因数
fall lift spring safety valve 全启式弹簧安全阀
final safety trip 终端安全脱扣
inside fall lift spring safety valve 内置全启式弹簧安全阀
open-spring safety valve 开启式弹簧安全阀
outside fall lift spring safety valve 外置全启式弹簧安全阀
Repairing and Adjustment of Spring Safety Valve 弹簧安全阀检修与调整
safety spring 安全弹簧
safety spring lever 安全弹簧杆
safety trip 安全跳脱; 安全脱断装置; 安全跳脱准位
safety trip level 安全跳脱准位
spring safety link 弹簧安全连杆
spring safety valve 弹簧安全阀; 弹簧式安全阀; 薄膜分离技术
spring safety-relief valve 弹簧式安全泄压阀
trip spring 松开弹簧; 跳脱弹簧
Spring Force of Constant Torque Spring and Wing-up Spring 定型发条及上炼发条的驱动力
e-business safety model safety strategy certificat 认证技术; 安全模型; 安全策略; 电子商务
safety conference on safety 安全会议