Glass connection, tubing constant pressure connection, single constant connection and tubing blanking plug are main tubing internal seal tool.
玻璃接头、油管定压接头、油管单向定压接头和油管堵塞器是目前各油气田使用较普遍的油管内密封工具。
ABSTRACT the specifications and the principle and construction of high speed al plate blanking machine and its cutting tool are introduced and the technical and economic analysis are made.
[摘要]介绍了厚铝板高速下料机的主要技术规格、工作原理、结构特点及切削工具，并对其进行了技术经济分析。
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