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Nắp hố ga Thành An

21 Nov

What is a drainage ditch?

Drainage ditches or drains are made of slabs to make grooves in public sewage treatment facilities. This type of cover is made from many different materials such as: stainless steel, concrete, cast iron, composite, grating. Each material has its own advantages. Depending on the needs of use, choose the most suitable material. Drainage ducts are […]

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