Pretty soon , everyone was amazed as the donkey stepped triumphantly over the edge of the well and trotted off 很快地，这只驴子便得意地上升到井口，然后在众人惊讶的表情中快步地跑开了！
Analyses and countermeasures on the fissures occurring in the surface structures which closely surrounds qinan coalmine ' s subsidiary shaft 矿井副井井口房工程裂缝的原因分析与治理之实践
Petroleum and natural gas industries - design and operation of subsea production systems - subsea wellhead and tree equipment 石油和天然气工业.水下采油系统的设计和操作.井口和采油树设备
And the woman took and spread a covering over the well ' s mouth ， and spread ground corn thereon ； and the thing was not known 19那家的妇人用盖盖上井口，又在上头铺上碎麦，事就没有泄漏。
And the woman took a covering and spread it over the well ' s mouth and scattered grain on it , so that nothing was known 撒下17 : 19那家的妇人用盖盖上井口、又在上头铺上碎麦、事就没有泄漏。
He suddenly fell to the gate and turned several rounds . he could not stop until he bumped his mother ' s green shell 他一下子滚落到井口“咕噜，咕噜”地转了好几圈，直到撞在* * *青壳下才停下。
He suddenly fell to the gate and turned several rounds . he could not stop until he bumped his mother ' s green shell 他一下子滚落到井口“咕噜，咕噜”地转了好几圈，直到撞在妈妈的青壳下才停下。
Petroleum and natural gas industries - design and operation of subsea production systems - part 4 : subsea welhead and tree equipment 石油和天然气工业.水下采油系统的设计和操作.第4部分:井口和采油树设备
Specification for underbalanced drilling technology - part 2 : the outfit requirements of the wellhead pressure control and surface equipment 欠平衡钻井技术规范.第2部分:井口压力控制装置及地面装置配备要求
Its drilling system uses a 380 - ton protective casing over the wellhead that is about the size of a six - story office building 它的钻探系统采用了重380吨、约六层办公大楼大小的保护罩（防爆装置）来保护井口。
