pressure relief spring 减压弹簧

packer relief spring 填装器松放弹簧

discharge valve relief spring assembly 排气阀缓冲弹簧组件

oil pump relief valve spring 油泵安全阀弹簧 ; 机油泵减压阀弹簧

oil pressure relief valve spring 油压安全阀簧 ; 限压阀弹簧

spring safety-relief valve 弹簧式安全泄压阀 ; 弹簧安全泄压阀

spring-loaded relief valve 弹簧安全阀

relief valve spring 安全阀簧

relief valve spring force 安全阀弹簧力