管堵是指用于堵塞管道端部内螺纹的外螺纹管件。
采用组合振动导苗筒式移栽机构解决导苗管堵苗问题。
The combined guiding seedling mechanism with vibration make seedlings drop to the transplanting furrow without being jammed in the guiding cylinder.
采用半封闭卸车、增加鹤管堵头等措施可有效降低作业空间的油气浓度；
Application of some measures, such as semi-close unloading and increase of crane tube plug etc. can availably decrease oil gas concentration in operating area.
可膨胀管堵水技术是一种利用膨胀管对套管补贴以实现水层封堵的新技术。
The water shutoff technology with solid expandable tube is a new technology to shut off water by repairing and strengthening perforated casing.
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