... steel wire then inserted into the mouth of pipe , in case of difficult stretching into or not, then ... full water in the pipe, the object can be crushed . (Blending of water that washed away after crused, drain cleaner ... circumstances Remedy:1,Fall into the pipeline in case of special materials, such as a toothbrush, chopsticks, ... cloth can be copied up.2,In case of not extend into the wire and could not ...