很(hen)多樓的地漏是三通(tong)結構(gou)的，堵塞時(shi)不好(hao)通(tong)，用疏(shu)(shu)通(tong)機疏(shu)(shu)通(tong)時(shi)彈簧從這頭(tou)(tou)進然后(hou)從那頭(tou)(tou)出，老是通(tong)不進總的下(xia)(xia)水管道(dao)，疏(shu)(shu)通(tong)三通(tong)管道(dao)的方法(fa)；這就(jiu)要求(qiu)疏(shu)(shu)通(tong)工人在作業時(shi)掌握手感，快進到三通(tong)時(shi)疏(shu)(shu)通(tong)機要停(ting)下(xia)(xia)來，感覺彈簧還沒下(xia)(xia)三通(tong)總口就(jiu)要來回帶幾下(xia)(xia)，彈簧在重(zhong)力(li)的作用下(xia)(xia)會往(wang)下(xia)(xia)掉，只要進下(xia)(xia)水道(dao)總的管道(dao)就(jiu)好(hao)了(le)(le)，繼續壓彈簧下(xia)(xia)疏(shu)(shu)通(tong)，很(hen)快就(jiu)能把管道(dao)疏(shu)(shu)通(tong)了(le)(le)。
