这是电场数学表达式的基础。This forms the basis for our mathematical expression for the electric field.可以认出,此表达式正好就是标积.We recognize this expression as just the scalar product.我们只推导出对于剧烈鼓泡床的表达式.We develop only the expressions for vigor...
He plucks Brazil nuts off the ground and tosses them into the basket.他从地上抓起巴西坚果，扔到篮子里。The Daughter of Jerusalem tosses her head as you flee.耶路撒冷的女子向你摇头.He whisks his cane tosses his head as if he were commanding the ghos...
Use reducer special for plastic extruder with alloy hard - toothed surface.采用合金硬齿面塑料挤出机专用减速机.Our main products: reducer , gear motor, bevel gear, worm - gear motor, cycloidal reducer and variator.公司主要产品有: 齿轮减速机; 蜗轮蜗杆减速机;...