案例1,事故发生在1975年7月11日上午九点左右,某厂锻压车间维修班在已架设完的锻造加热炉输油管道上焊装蒸汽管之过汽管,气焊工王××与锻工朱××(男,52岁)面对面同站在4m高的铁塔上,由于过汽管孔向下,不易施焊,朱××就将固定油管的U形螺丝的螺帽松开,用一根长约1m的撬棒将输油管撬起,王××在油管下垫入150mm扳手一把后又垫入20mm管子一根,仍感高度不够,王××叫朱××再撬高一点以便将红砖塞到管子下面,由于用力过猛,输油管被撬滑脱向朱××站立的方向 Case 1, the accident occurred at about 9 o’clock on the July 11, 1975, a workshop forging workshop maintenance class has been erected forging furnace oil pipe welding steam pipe over steam pipe, gas welder Wang × × and forging workers Zhu × × (male, 52 years old) face to face with the 4m high tower, due to the steam pipe hole down, not easy to weld, Zhu × × will be fixed tubing U-shaped screw nut loose, with a Pry bar root length of about 1m pry oil pipe, Wang XX in the tubing under the 150mm wrench into a 20mm tube and then pad one, still not enough sense of height, Wang × × called Zhu × × and then pry higher so that The red brick plug to the pipe below, due to excessive force, the pipe was pry slip off Zhu × × direction