一种塑钢包覆管材及制造方法，由内塑料管层、粘接层、钢管层、热熔胶层和塑料包覆层所组成。
A plastic-steel coated pipe is composed if internal plastic pipe, adhesive layer, steel pipe layer, thermosol layer and plastic layer.
放水阀的进水管可接一根长塑料管，并与水源接通，可用来开穴与浇水。
A water inlet pipe of the water discharge valve can be connected with a long plastic pipe and a water source for opening cavities and watering.
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