equivalent sand diameter rouhness 相当砂径粗糙度
large-diameter sand pile 大直径砂桩
large diameter sand pile 大直径砂桩
Suck sand tube diameter 吸砂管直径
gravel-to-sand median diameter ratio 地层砂直径中值比
Sand diameter<0.05mm can pass the channel, but sand diameter at the range of 0.05-0.1mm is apt to depositing in the lumen and channel of drip tape, furthermore it causes emitter clogging.
粒径<0.05mm的泥沙可以顺利通过流道,但粒径处于0.05-0.1 mm范围内的泥沙则易沉淀在滴灌带管腔内和流道内,从而引起灌水器堵塞。
参考来源 - 滴灌带抗堵塞性能与临界含沙水流滴灌带抗堵塞性能与临界含沙水流研究临界含沙水·2,447,543篇论文数据，部分数据来源于NoteExpress
The quantitative relation among the threshold wind velocity of sand movement, sand diameter and the agglutinate stress of sand bed is obtained with the mentioned dimensionless variables.
经分析得到起沙风速与沙床沙粒粒径和沙床粘结力间的数量关系。
The island is about 60 feet in diameter, covered in sand, plants and mangrove trees.
这座岛直径60英尺，表面覆盖沙土，种植了红树和其他植物。
Large diameter close to the cart in front wheel, high landscape, a variety of sand soil road potholes can pass.
超大前轮，直径接近推车中的高景观车，各种沙石土路坑洼路面都能通过。
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