美规
- 网络USA
美规
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安全认证也分美规和欧规两大体系。
Safety certification is also classed into American and Europe standard two series .
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园艺产品输美面临的合规性贸易壁垒分析
Analysis of " Compliance " Trade Barriers China ′ s Horticultural Products Exports to the U.S.Face
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为使公路桥设计更能适应发展趋势,通过参考英、美两本新桥规,提出所需明确的6个问题:①常规和特殊活荷载;
For improving our highway bridge design , the authors refer to two new specifications from UK and USA , and raise 6 problems for discussion : 1.Normal and special traffic live loading ;