The torch can bring higher arc voltage with lower fluctuation by elongating the arc.该喷枪能够提高电弧电压并减小电弧电压波动.If the input voltage is plus three, it comes out as minus six.如果输入的电压是+3伏, 那么输出的电压便是-6伏。A high - voltage output fly...
...a bowl of fir cones.一碗冷杉树球果The rotten degree of fir trees is an important sign of quality of Abies forest.冷杉林木腐朽程度是冷杉林分质量变化的重要标志.Conifer tree style such as pine, fir, spruce, redwood, juniper, etc.针叶类树包括松树 、 杉树 、 云杉 、...