This blog is written by author Sachiko who is not a native speaker of English, so it may be hard to read. It is translated from the summary of Japanese page; http://akitaodatelifejp.hatenablog.com/

Drainage of water hose

Concrete mixer trucks have water hose outside to wash their body.

In winter after using the water hose I have to drain water in order not to freeze, however short time is untill next using.

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