机架的常见缺陷有裂纹、掉砂、夹渣、缩孔缩松和晶粒粗大等。
The common defects of the housing casting include cracks, sand drop, slag inclusion, shrinkage porosity and rough grain, etc.
以防砂浆不牢固掉砂，刹平后用铁抹子轻走一遍“压毛”以保墙面养护牢固。
After wall plastering, stabilizing time shall be ensured to prevent mortar peeling, after stabilization, an iron float shall be used to flatten the wall to guarantee firm wall curing.
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