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Stainless steel Pipe ASTM/ASME SCH 40 Seamless A/SA312 ขนาด 3"x 6M. bkssteel SCH 40 Seamless SUS304 Grade 304/304L ขนาด 3"
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Stainless steel Pipe ASTM/ASME SCH 40 Seamless A/SA312 ขนาด 3"x 6M. bkssteel SCH 40 Seamless SUS304 Grade 304/304L ขนาด 3"