What are communications cables, manhole holes, and hand hole wells? What are they like?
A manhole is where people can go in.Hand hole well, that is, can not enter the person, can only stretch in the well, for dark when it is convenient to wear thread. Also known as work pit, the general size of 40x70x70, mainly to cement brick structure. There are also resin - based hand holes, which are relatively light in weight.
A manhole is a well where people can go in.
The hand hole refers to masonry cement bricks, above the lid can be opened, to provide convenient working pit hydropower HVAC outdoor pipeline laying, valve switch installation, hand hole is usually small, generally below 40x70x70cm, people can enter the cable connection or operation.
