下列哪些属于水力参数() ["射流速度","射流水功率","射流冲击力","钻头压降","钻头水功率"]
有些词因为单独使用时无实际意义,或者出现频率过高,因此CSA规定这些词为禁用词(Stopword),如() ["A、in,at","B、of,about","C、up,out","D、is,are"]
肯定结论一般具备哪些条件?
转盘钻扶正器钻具组合能() ["增斜","降斜","稳斜","仅只能稳斜"]
专利的类型包括() ["A、发明专利","B、外观设计专利","C、实用新型专利","D、新技术工艺专利"]
鉴定结论的种类有哪些?