The common defects of the housing casting include cracks, sand drop, slag inclusion, shrinkage porosity and rough grain, etc.
机架的常见缺陷有裂纹、掉砂、夹渣、缩孔缩松和晶粒粗大等。
It may also use signal process system to decrease noise efficiently for compound expanded pipes, due to austenite rough grain size.
对于复合扩径管，由于奥氏体粗晶度的原因，也可以采用信号处理系统有效地降低噪音。
It may also use signal process system to decrease noise efficiently for compound expanded pipes, due to austenite rough grain size.
对于复合扩径管，由于奥氏体粗晶度的原因，也可以采用信号处理系统有效地降低噪音。
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