Because of the limit of measuring tools, the traditional methods can not evaluate the cylindricity error of internalpipe.
由于测量工具的限制,传统方法对无法充分接触的内部管道的圆柱度难以测量。
2
Due to the compressed air pipeinternal may produce pollution, so in the air into the powder coating system best filter processing after before.
由于在压缩空气管道内部可能产生污染,所以在空气进入粉末涂装系统之前最好经过过滤处理。
3
But Missouri-based Insituform Technologies’s new InsituMain liner can withstand the internal forces of pressurized pipe, allowing in-place repair of drinking-water mains.