A typewriter in which the characters are situated on a type ball.
字符装在字模球上的一种打字机。
In this paper, all the calculation formulae and the program for the grinding of Gothic arc type ball tr…
本文应用共轭曲面理论，导出了球笼式万向节形壳内滚道磨削加工的计算公式并编制了相应计算程序。
It consists of pneumatic piston actuator and the composition of O-type ball valve, valve core sphere using cylindrical hole.
它由气动活塞式执行机构和O型球阀组成，阀芯采用圆柱形通孔球体。
The third generation of "o" type ball valve for soda was special high performance valve for soda developed by Shanghai Fisher valve.
第三代纯碱专用“O”形球阀是上海费希尔公司开发的高性能纯碱行业专用阀。
The testing method and data processing procedure for random load on the transmission system of a BED type ball mill with straight flow are presented.
介绍了直燃式双进双出钢球磨煤机传动系统随机载荷的测试方法及数据处理步骤。
The testing method and data processing procedure for random load on the transmission system of a BED type ball mill with straight flow are presented.
介绍了直燃式双进双出钢球磨煤机传动系统随机载荷的测试方法及数据处理步骤。
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