毅枫激光焊补技术中心是一家代理ROFIN设备的新兴公司.Yi Feng laser welding technology center is an agent ROFIN equipment emerging companies.详细叙述了大型铸铁导轨缺陷的热焊补方法,从不同角度考虑选取了铸件的焊补工艺.The hot welding repairing method of defects of heavy cast iron guid...
“ 我真佩服你老当益壮的侠义精神, 罗瑞先生. ”'How I admire the gallantry of your youthful spirit, Mr. Lorry.'“ 我必须再说一遍,我衷心佩服你老当益壮的侠义精神. ”'I must say again that I heartily admire your gallantry and youthfulness.'他很佩服中世纪武士...
Brackish waters generally support only a small range of faunas.咸水水域通常只能存活为数不多的几种动物。We shall appreciate this difficulty more clearly, by looking to certain existing faunas and floras.通过观察某些现存的动物群和植物群,我们就能更清楚地了解这种困难了.Most ...