不可冲蚀的土块因跳跃颗粒的撞击也会破碎.Nonerodible clods are also broken down by impacts of saltating grains.土块粘在铁铲上.Clods of soil stuck to the spade.东西南北 到处都有这样的土块.North , southand west , everywhere on the made of dirt and rocks....
Ni-Al-X 催化剂是己二腈加氢的优良催化剂.The said catalyst was a good hydrogenation catalyst for adiponitrile.在间歇式反应器中成功地实现了己二腈 ( ADN ) 在近临界水中的水解.Hydrolysis of adiponitrile ( ADN ) in near - critical water was successfully conducted in a...