在铝容器的下部有一个球形鼓包,如图1所示,最初,我们采用人工敲的办法。即铝罐做成后,外面垫一铸铁胎,用气焊枪烤加热,工人钻进简体内,放一内胎,用大锤敲击。其缺点是劳动强度大,劳动条件坏,效率低,质量差,浪费氧气和电石。后来遵照伟大领袖毛主席关于“尽量采用先进技 In the lower part of the aluminum container has a spherical bulge, shown in Figure 1, initially, we use manual knocking. After the aluminum can was made, a cast iron tire was padded outside and briquette heated with a gas torch. The workers drilled into the simplified one, put a inner tube and struck it with a sledgehammer. The disadvantage is the labor-intensive, bad working conditions, low efficiency, poor quality, waste of oxygen and calcium carbide. Followed by the great leader Chairman Mao on "Try to adopt advanced technology