This paper describes the structure and basic operating principle about the squeezed ma - chine of core of the long cylinder ofmainoil pipe of Cat, 121 diesel engine's body.
本文介绍了卡特匹勒121型柴油机机体主油管长圆柱坭芯挤压机的结构和基本工作原理。
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Complex geological body is main types of complex oil and gas reservoir, and its irregular geometrical shape and acutely variable velocity have an effct upon the accurate imaging of complex reservoir.