[拼音]：youqijing jingxia zuoye shebei[外文]：work-over equipment for oil and gas wells适用于小修（维护油井正常生产的日常措施

[拼音]：youqijing jingxia zuoye shebei[外文]：work-over equipment for oil and gas wells适用于小修（维护油井正常生产的日常措施