frost prevention shed 苗木防霜棚
frost prevention equipment 防霜设备
measures of frost prevention 防冻措施
Techniques of frost prevention 防霜技术
In order that the crops in open field could survive safely the winter frost prevention operation is of Paramount importance.
为了使这些大田作物能够安全越冬，防霜作业具有极端重要意义。
The only small-scale weather modification other than local frost prevention is that of clearing an airport or airstrip of fog.
除局地防霜外，唯一的小尺度人工影响 天气 作业是清除航空港或简易机场上的雾。
The research achievement of the embankment constructed with frost susceptibe a loose fine aggregate and fly ash and frost prevention are introduced.
主要介绍冰冻地区利用具有一定冻敏性的松散细集料粉煤灰修筑路堤及冻胀防治的研究成果。
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