The dam harnesses the energy of the river.水坝利用水的能量.Gyms usually provide ropes and rent shoes harnesses and belaying devices.攀岩场通常会提供绳索以及出租攀岩鞋、安全带跟确保装置.These include dobbies, cam motions, electronic Jacquard machines and ...
水中的一点点酸就会杀死鱼卵和小鱼.Fish eggs and young fish are killed by even a little acid in the water.鱼卵在马拉松运动员衣服上做 什么 ?What are fish eggs doing on a marathon runner's shirt?鱼卵比它们长成后的鱼致密250倍.Roe are 250 times more compact than th...
The flywheel on the eccentric shaft can be exchanged and connected by the distensible cover.飞槽轮在偏心轴上的两端位置可以相互调换,并通过胀紧套连接.Remove the bezel and rubber gasket from the motor output shaft.从马达输出轴上拆卸玻璃框和橡皮垫圈.Cross cardan shaft...