1.
As this occurs, valve springs pull the valve tightly closed against its opening, called the valve seat.
当这发生时，气门弹簧紧紧地关闭气门口，叫做气门座。
2.
The two types of engine valves are intake and exhaust.
发动机气门的二种型式是：进气口和排气口。
3.
Stand clear of the regulator and valve outlet, while opening the valve.
开启阀门时，躲开调整器和阀门排气口。
4.
He stood, a threatening figure, framed in the doorway.
他站着，气势汹汹地堵住门口。
5.
A stream of cold air rushed through the open door.
一股冷空气从敞开着的门口窜了进来。
6.
They hang up red lanterns and balloons in front of their houses.
他们在家门口挂红灯笼和气球。
7.
She took a deep breath and lowered her voice.
他长舒了一口气，降低了嗓门。
8.
Replace the cylinder outlet seal and valve cap.
替换钢瓶排气口密封和阀门帽。
9.
When she heard him open the door, she spitefully refused to speak first.
她听见鸿渐开门，赌气不肯先开口。
10.
Dynamic investigation on hypersonic sidewall compression inlets with cowl valve during the process of transition
带唇口封气活门的高超侧压进气道过渡态工况气动性能
11.
She took a deep breatn and opened the front door."Stop!" she shouted.
她深深吸了一口气，突然打开前门，大喝一声：“站住
12.
Deborah gasped when her daughter walked in the door.
德博拉看见女儿进门时倒抽了一口冷气。
13.
Typically all valve outlets will be aimed downward on a tube trailer.
在管道拖车上，所有阀门排气口一般都朝下。
14.
Loosen the valve outlet seal slowly when preparing to connect a cylinder.
准备连接钢瓶时，慢慢地松开阀门排气口密封。
15.
At the door of the engine room,the engineer sat smoking a pipeand taking the air.
机械师 坐在机房门口，边抽烟斗边透一透空气。
16.
Improvement for Room Type of Forging Furnace Door Equipment
室式燃气锻造加热炉炉门口装置的改进
17.
Craftwork for Installation of 3000t coffer of intake water of Xiamen gas-fired power plant
厦门燃气电厂取水口工程3000T沉箱安装工艺
18.
Every five minutes, get up, open the door, peek out, close the door and look relieved.
每隔五分钟，站起来开门，向外窥探，然后关上门，松一口气。