Abstract: Friction drag is the major part of the total drag of a transport, so reducing it is essential for improving the performance and reducing the cost of a transport.
摘要：摩擦阻力占民机总阻力的很大比例，减少摩阻对改善民机性能和降低成本具有重要意义。
Friction drag is the major part of the total drag of a transport, so reducing it is essential for improving the performance and reducing the cost of a transport.
民机受到的摩阻占其总阻力很大比例，减少摩阻对改善民机性能和降低成本具有重要意义。
L High mechanical strength, anti-friction and suitable for on-line back flush, easy to operate and low cost.
l机械强度高、耐磨、适宜在线反冲洗，操作方便，运行成本低。
The bigger the friction is, the lower the gas flow is, and so the running cost of the pipeline increases.
因而，要提高长距离输气管线的输气流量、降低运营成本，降低摩阻系数是非常必要的。
The one-way race way clutch wheel has the advantages of less friction, less noise, simple structure and low cost.
并且无需额 外的护轨来限位滑块，具有结构简单、适合批量生产成本低的优点。
The mixing shaft is heat treated and the main wearing parts are alloy anti-friction materials, which make it long service life but cost low.
搅拌轴经热工处理，主要易损件为合金耐磨材料，经久耐用、费用低廉。
The mixing shaft is heat treated and the main wearing parts are alloy anti-friction materials, which make it long service life but cost low.
搅拌轴经热工处理，主要易损件为合金耐磨材料，经久耐用、费用低廉。
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