咬边

1991 The technique design plan machinator and maker of the first gas-tight fumigation double profiling silo of China in Tianjin Xizhan Grain Depot.

1991年天津西站粮库中国第一座熏蒸式螺旋边板仓技术设计方案策划者、制定人。

The purpose of prebending process of longitudinal submerged arc welding pipe production line is introduced;character of roller prebending and mould press type prebending is analyzed.

对螺旋埋弧在生产过程中产生边的原因进行了分,了针对这些原因应采取的相应措施。