成川型錄1...CNS 4435 JIS G3444 Carbon Steel Tubes for General Structure kg/mm2 (N/mm2) c 0.25 0.24 0.18 0.23 s 0.05 0.04 0.04 0.04 0.04 CNS 4435 JIS G 3444 STK 290 STK 400 STK
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