In any embodiment, the bottom of the feeder can contain a removable plug for cleaning of the feed chamber.
在任何体现,各线接驳底部可以包含的饲料室清洗一个可移动的插头。
In accordance with the need of bottom water shutoff for many oil and water Wells in oilfield, a new type removable bridge plug was designed.
根据油田油水井堵底水的需要,设计了一种新型可取式桥塞。
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