Concrete is one of the most important constituent materials in the construction industry, it is a porous structure, made up of a certain proportion of cementitious materials and aggregates, and then add a certain amount of water and the need to add additives, after uniform mixing, moulding, hardening of a kind of artificial stone. It is widely used in the construction industry, machinery industry ...
As we all know, the hotel is a very large personal flow of places, bedding by countless people have been lying touched, for the cleaning of the sheets is the hotel daily must do things. Hotel laundry room takes on the work of the entire hotel dirty supplies, including bed sheets, quilt covers, bath towels, washcloths, hand towels, pillow towels, etc., overnight need to clean such a large amount of...
With the increasing awareness of environmental protection, sewage treatment has also received more and more attention. Cesspool is the main equipment for sewage treatment, whether it is domestic wastewater or industrial wastewater, which contains a large number of polluting substances, the composition is more complex, so the difficulty of water treatment is also higher. In the sewage treatment pro...