為了混合或者調(diào)制而使之進(jìn)入一種通常是圓周的運(yùn)動(dòng)狀態(tài).Both of approaching and returning movements are along the tangent of the circle.采用管件和管道制造商推薦的工具. 所有工具必須能夠?qū)崿F(xiàn)完美圓周的壓緊作業(yè).Use tools recommended by fitting and tubing manufactures. All tools must make...