Analyze the market prospects of fan for Metro and tunnel in our country, introduce the type, character and applied range of fan for Metro and tunnel.
分析了我国地铁和隧道风机的市场前景，介绍了地铁和隧道风机的品种、特点、应用范围。
This paper discusses the character of material, applied range, constructive and test method of the PE composite geotechnical.
阐述了PE复合土工模的材料特点、应用范围及施工、检验方法。
High charge density organic flocculant is being paid attention to, developed and applied by the researchers at home and abroad because of its flocculant character and its wider applied range.
高电荷密度有机絮凝剂因其优良的絮凝性能和较宽的适用范围，受到了国内外众多研究者的重视与开发应用。
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