They tried to get the harpoon into the ray before the sting tail came lashing over to retaliate.他们试图把鱼叉刺进鳐鱼体内，以防它猛摆那蜇人的尾巴报复。The harpoon drove deep into the body of the whale.渔叉深深地扎进鲸鱼体内.They tried to get the harpoon into...
The intention of this article is phase difference ultrasonic flowmeter.本论文的研究对象是相位差法超声波流量计.The design of Coriolis force mass flowmeter is introduced in this paper.文章介绍了一种自行开发研制的国产智能型科氏力质量流量计.The magnetic flowmeter is exp...