1. The panyabutan karat tina beungeut pipa baja kedah ngahontal standar sa2.5 of gb8923-88, némbongkeun warna alam logam, tanpa gajih katempo, kokotor, karat, sarta kantétan lianna. 2. Lapisan anti korosi kudu diubaran dina 24 jam, kalawan ketebalan seragam, compactness, n ...
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