Do you know the differentiation of manhole covers?In Japan, most manhole covers have unique numbers ...

Do you know the principle of elevator?Lifting principle: The hydraulic oil is formed by the vane pum...

What's wrong with the bathroom vent?1, the check valve of the ventilation duct fails, and the odor r...

Do you know what kind of floor drains there are?1. Deodorant floor drainThe diameter of the deodoran...

How to deal with water leaks around attic skylights? 1. If there is water leakage around the skylig...

What are the precautions for the use of lifts? 1. The mechanical operation should be soft and smoot...

Do you know what types of floor drains there are? (1) 1. Air-sealed floor drain One feature of the ...

Do you know what types of floor drains there are? (2) 5. Spring type floor drain Divided into upwar...

1. Size. The reserved holes for drainage by real estate developers are relatively large when the hou...

⒈Monthly maintenance During the maintenance of the lift platform, personnel enter the lift platform...

Fixed lift is a kind of lift with good lifting stability. It cannot move and can only be fixed for o...

Do you know what types of manhole covers are there? 1. According to the material, it can be divided...