怎么才能稍微last 时间久些? Go get some Viagra...
Here is what I see:
The cast iron pipe is broken. The pressure around the broken pipe forces dirt into the pipe. Once you snake it, it will be open for some time, but sooner or later dirt will fall in again to block the pipe.
The cast iron pipe is broken. The pressure around the broken pipe forces dirt into the pipe. Once you snake it, it will be open for some time, but sooner or later dirt will fall in again to block the pipe.