The device for forestation by fixing dry sand comprises a plurality of water containers and gratings for fixing dry sand, wherein each water container is fixedly connected with the grating;
干沙土固土植树造林装置,包括多个聚水容器、用于固定干沙土的格栅,所述每个聚水容器均与格栅固定连接;
And that in Turin there are people who sleep on the pavements, over warm cellar gratings.
在都灵,有人睡在大街上,蜗居在地下室格子间。
Graduations manufactured with the SUPRADUR process act optically like three-dimensional phase gratings, but they have a planar structure and are therefore particularly insensitive to contamination.
毕业与制造过程中的行为SUPRADUR像光学三维相位光栅,但他们有一个平面结构,因此特别不敏感的污染。
应用推荐