high vacuum valve

• 高真空阀门,高真空阀,高真空电子管

high vacuum valve的用法和样例：

例句

1. The vacuum valve opens to admit air.
   真空阀开启以补充空气。
2. Toyota dealers would install a newly designed intake air connector which relocates the brake system vacuum port free of charge.
   丰田将免费在这些车上，安装新设计的进气连接装置，对制动真空阀进行重新连接。