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。
The Maharic Seal technique is a keystone tool of such importance that it is made freely available to all.
马海拉封印技术是一个非常重要的关键工具，可供所有人使用。
Analyse and design mechanism, seal structure, shape of shovel head and length of tool chamber.
对水下液压冲击铲的机械本体、密封结构、铲头形状、工具腔长度等进行了设计、分析。
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