凹槽

Gear lubricants may congeal and channel in cold weather.

天气冷时齿轮润滑油可能凝成凹槽。

Sliding doors and windows move in groove.

滑动门和滑动窗都在凹槽中移动。

Owing to the construction of body, it might be hard to bestud acrylic into gorge and won't loose it.

由于构关系，要使压克力板能够完全嵌合在原先凹槽上不脱落，会有一些困难。

The grooved head of the sprue puller creates an effective undercut which is used to pull the sprue, or secondary sprues in underfeed designs.

主流道拉料杆头部凹槽成了一个有效底切，可以用来拉出主流道或者是下进料设计中二级主流道。

The glass bottle is clear at the bottom, graduating into black towards the all-black cap.Crystal droplets are engraved on the back of the flacon, which was designed by French sculptor Serge Mansau.

前天到水晶灯版视频，相当梦幻，今天拿着瓶子在射灯下，边照片上凹槽，确实美仑美奂，很像水晶珠串，光真是神奇。