unitized solid-block tree
... 整体式基盘：unitized template 整体式采油树：unitized solid-block tree 整体生产树：block tree ...
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本实用新型提供一种整体式采油气树，其特征是四通和相互连接的主杆为一个空心长方体的整体锻压件；
The utility model provides an integral petroleum production tree, which is characterized in that a pipe cross and mutually connected main bars are a hollow and cuboid integral forging piece;
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