Many large cylinder mix machine cracked frequently in our country, which influenced production seriously, and caused the great economic losses.

我国的烧结混料机故障频发，尤其是筒体经常出现裂纹，严重影响了生产，造成重大经济损失。

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After the ND4 diesel locomotive made in France only operated about 30,000 km, the cylinder heads of its AGO diesel engine cracked at the bridge of two-valve seats and other places.

由法国进口ND_4型内燃机车上的AGO柴油机气缸盖，仅运用三万公里左右即在气阀座过桥等处产生裂纹，严重影响机车安全运行。

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