工人叔叔在做焊接工作时,电焊枪会发出强烈的电焊弧光。许多小朋友常常好奇地观看,这是极其危险的。因为电焊弧光会造成眼睛疼VM8qZoRL4MTgYGL8yVN5kllKJcD/vAAiaI8zwLemyes=痛、视力减VM8qZoRL4MTgYGL8yVN5kllKJcD/(试读)...