bahan pipa: ngawengku: (Bahan kudu equable, kompak sarta bisa ngirimkeun ultrasound) baja karbon, stainless steel, beusi tuang, beusi ductile, Tambaga, PVC, Aluminium, Asbés, Fiberglass, Batur Liner bahan: Taya liner, Tar Epoxy, Karét, mortir, polipropilén, polistiol, polisti...
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