When the sand has finished falling, you have to turn the sand glasses over.
当沙子落完的时候，你必须把沙漏翻过来。
The landscape fell away, revealing a seemingly infinite vista of rippled sand mounds, rising and falling like the folds in a quilt.
这里视野开阔，看到的是无边无际起伏的沙丘，像被子上的褶皱。
There are eighteen big pools, spring flourer , Autumn moon, smooth sand, falling goose. etc. There are all kinds of strange things, the eyes cannot take it all in.
春花、秋月、平沙、落雁、曲、叠、沉、悬潭等十八个名潭撒落在幽深的大峡谷里，千姿百态，各领风骚，令人目不暇接。
The vibration source of the falling sand machine is divided into mechanical, electromagnetic and pneumatic.
落砂机的振动源分为机械﹑电磁和气动。 。
Many reasons like out sand, deposition of case dirty, falling things and cement injection can cause the drill pipe sticking and the well abandoned.
因出砂、套管垢沉积、落物、注灰等原因常造成钻杆卡钻，导致油水井报废。
Many reasons like out sand, deposition of case dirty, falling things and cement injection can cause the drill pipe sticking and the well abandoned.
因出砂、套管垢沉积、落物、注灰等原因常造成钻杆卡钻，导致油水井报废。
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