air tight ring 气密环
gas-tight ring 气密环
p tight ring 顶部密封环至 ; 顶部密封环
oil tight ring 油密封圈
vacuum tight ring 真空密封环
LDA tight ring-pump LDA紧密环绕抽运
tight hymenal ring 处女膜环过紧
The enemy troops tried to surround our soldiers in a tight ring, but we backed away successfully.
敌军试图把我们的战士困在包围圈里，但我们成功地撤了出来。
Shut the doors and the Windows tight, put on your favorite song, and let your voice ring!
关紧门窗，放上最爱的音乐，让你的声音响起来吧！
After installing the packing ring, twisted tight bolts, and confirmed with the filler material to build the right side junction box.
在安装填料环之后，扭紧螺栓，并确认料盖与填料箱面正确接合。
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