GRADE SPCC 1B ... 低硬度. Low. Hardness. JIS G3141 SPCC-1B ... 低硬度. Low. Hardness. 0.15 2.30. 0.30 ∼ 2.30. 1/2 硬板. 1/2 Hard. 0.50 ∼ 1.75. 1/4 硬板.
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