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Question:

Is there a cloak on the surface flaw in casting? What do you mean?

Is there a cloak on the surface flaw in casting? What do you mean?

Answer:

because most of the cavity is not a whole, are a few blocks assembled together, and each joint assembly can not avoid the molten iron drill into the gap, the gap, formed a thin iron sheet, namely fash.
Should be put in the seam, casting process, need forming cavity, the cavity is cast into the shape of the cavity into the molten iron, the casting process,
Strictly speaking, fash not casting defects, because the phi on cleaning and polishing off the OK, and generally not clean up before casting will exist with joint

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