Awọn ọja
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wọpọ ti a mọ bi Iron igun, jẹ irin ti o gun pẹlu awọn ẹgbẹ meji perpendiculilar si kọọkan miiran. Irin irin-dogba lo wa ati awọn ohun elo igun-ara.the isipo ti awọn ẹgbẹ meji ti irin iwọn dogba. Awọn alaye ni alaye ni MM ti iwọn fifẹ × ọjọ-pupọ. Bii bii "∟ 30 × 30 × 3", iyẹn ni lati sọ, irin ti igun dogba pẹlu iwọn ẹgbẹ ti 30mm. O tun le ṣe afihan nipasẹ awoṣe. The model is the centimeter of the side width, such as ∟ 3 × 3. The model does not represent the dimensions of different edge thicknesses in the same model, so the edge width and edge thickness dimensions of angle steel shall be filled in completely in adehun ati awọn iwe miiran lati yago fun lilo awoṣe nikan. Awọn alaye ti ti yiyi gbona jẹ irin ẹsẹ onigun mẹrin kẹkẹ irin jẹ 2 × 3-20 × 3.
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