试验结果表明：在较小的同一荷栽作用下，角钢与混凝土间的摩擦力主要是由前端部分承受；
The results of laboratory tests show as follows:The frictional resistance between angle steel and concrete is primarily acting on the front end under the same small load;
采用单一的荷电纳滤膜是不能实现同名离子和反荷离子之间的高效分离的。
Good separation of co-ions and counter ions cannot be achieved by a single type of the singly charged NF membranes.
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