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1)  silkworm rearing with holed film
打孔薄膜覆盖育
2)  cover with plastic screen
覆盖薄膜
3)  warm-keeping sand covered with membrane
薄膜覆盖砂
1.
With the construction practice of the massive concrete raft foundation of a certain comprehensive building as a practical example, the application of the two techniques of the "temporary blocking for one-stroke casting of concrete"and"warm-keeping sand covered with membrane", and its key technical links are presented in the paper.
结合某综合楼大型混凝土筏板基础的施工实践,介绍"临时堵截一次浇筑混凝土"和"薄膜覆盖砂蓄热保温养护综合温控"两项施工技术的应用过程及关键技术环节。
4)  covered rearing with plastic film
塑料薄膜覆盖
5)  plastic-laying machine
塑料薄膜覆盖机
6)  cover materials
薄膜覆盖材料
1.
Research and exploitation of new pattern cover materials are very important area in our country establishment agriculture.
新型薄膜覆盖材料的研究和开发是我国设施农业的重要研究方向。
补充资料:多孔农用薄膜
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性质:由具有许多孔眼而能自然调节温度的农用薄膜。日间温度升高时,能通过孔眼散热降温。夜间气温下降时,孔眼则被露堵塞、停止散热。因而温度波动较少。且薄膜棚内相对湿度较高,水的热容量很大,又能防止霜冻。此外,压力波动不大。这些都有利于农作物的生长和增产。

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