Copper tubing shall not be used on the downstream side of the backflow preventer.
在防回流阀的下游不应该安装铜管。
Second check must be drip tight when pressure is applied to downstream side of valve.
当阀门下游一侧出现压力时，第二止回阀必须是无滴漏。
Simultaneously, some rather instable rock masses were formed in some parts of the upstream and downstream side-walls of the main machine hall.
同时，在厂房上下游边墙的局部地段形成比较严重的不稳定岩体。
Autologous chemotaxis produces downstream migration because the concentration of ligands is increased on the downstream side of the cell, as Swartz had found.
正如施瓦茨所发现的，自体同源趋化作用产生顺流迁移，因为配合基浓度在细胞的下游边上的以增强。
A second roller is disposed in a downstream side of the printing area in the first direction, and is adapted to transport the printing medium in the first direction.
第二辊，其在所述第一方向上布置在所述打印区域的下游侧，并适于在所述第一方向上传输所述打印媒介；
Then, in the Middle Ages, engineers discovered that such supports would last even longer if their downstream side was also shaped to offer little resistance to the current.
然后，在中世纪，工程师发现这些桥墩在下游这一侧如果也建成对水阻力比较小的形状，桥墩寿命还要延长。
The main dynamic interference effect is the increasing effect, and when the shell is on the downstream side of the interfering building, the dynamic interference effect is bigger.
动力干扰主要表现在增大效应，当受扰建筑处于施扰建筑的下游时，动力干扰效应较大。
Results showed that the net heat loss on the downstream side of the jet nozzle could reach 20 ~ 30% of total heat flux. Therefore it can not be neglected in calculating the wall temperature.
结果表明，喷管下游端的壁面辐射损失高达壁面总热流的20 ~ 30%，在壁温计算时不容忽略。
As the wind strikes the actuator disk on the upwind side, the pressure rises there, and the wind is deflected away from the disk, causing a large wake downstream of the disk.
当风力在逆风侧冲击促动盘时，那里的压力上升，并且风力从盘转向离开，引起盘下游的较大尾流。
Starting from the outlet of the pump, the water runs through the upstream tank (on the Kaplan side), the model, the downstream tank and back to the inlet of the pump.
从泵的出口，水流通过上游水箱(在轴流式水轮机这边)、模型机、下游水箱返回泵的进口。
Objective:To investigate and compare the antibiotic resistance condition of the thermotolerant coliform isolated from the side situated upstream and downstream from hospital sewage discharge point.
目的：了解并比较医院污水污染前后水体中耐热性大肠菌群的耐药情况，初步探讨医院污水排放对自然水环境中微生物耐药性的影响。
The wider the stream, the longer it takes the slingshotting current to reach the other side, and the greater the downstream distance to the next curve.
河流越宽弹弓般的水流到达岸的时间就越长，弧间沿流距离也越长。
The wider the stream, the longer it takes the slingshotting current to reach the other side, and the greater the downstream distance to the next curve.
河流越宽弹弓般的水流到达岸的时间就越长，弧间沿流距离也越长。
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