A test rig for testing the flow characteristics of ball orifice is introduced. Experiments on the flow characteristics of ball orifices with different structure parameters are carried out.
介绍了球阀阀口流量特性试验装置，对水压球阀在不同结构参数下的流量特性进行了试验研究。
A person responsible for testing the mud at a rig and for prescribing mud treatments to maintain mud weight, properties and chemistry within recommended limits.
在钻井中负责泥浆测试，并负责泥浆处理而使泥浆重量、性能和化学性质保持在规定范围内的工作人员。
BMW Corporation of West Germany has developed a torsion rig for universal joint propeller shaft and axle shaft for the use of testing four-wheel-drive cars.
联邦德国的BMW公司开发了一种万向节传动轴与半轴的扭转试验台，专供四轮驱动型桥车试验用。
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