In the actual work, it is often discovered that there is a big deviation between actual size of some bending parts after die molding with computing size.
实际工作中,常常会发现有的弯曲件经模具弯曲后的实际尺寸与预先计算的展开料尺寸有较大偏差。
Sometimes because of some nearby utility lines, they have to build rails bending.
有时候因为附近有些公用线路,他们建立了弯曲铁轨。
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