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Grating steel diproduksi dari kombinasi virkan/besi ulir dan plat strip besi yang disilang dan disambung kuat dengan cara dilas. Setelah pabrikasi selesai, grating kemudian melewati fase coating read more dimana materialnya harus melalui proses celup panas scorching dip galvanis. is often a sound suppressor product of glass fiber. the primary func