For example, this might happen when two ore more of the tables in the MQT have a referential integrity relationship defined and the join predicate is on their primary key - foreign key columns.
例如，当MQT中的两个或多个表定义了引用完整性关系并且联结谓词在它们自己的主键-外键列上时，就会出现这种情况。
Research on continuous ore drawing and haulage equipment for underground metal mines has widely been done in main foreign countries with mining industry.
国外主要矿业国家对地下金属矿山连续出矿运矿设备进行了深入的研究。
It is a product of foreign investment in new projects, increased production and a recovery in the iron ore price over the past six months, " said Heathcote."
这是新项目外国投资、产量增加和过去六个月内铁矿价格复苏的结果。
High-energy hydraulic hammer with liquid cushion is a new and highly efficient equipment used for the secondary breaking of ore boulder occurred very often in domestic and foreign mines.
液垫式高能液压碎石器是解决目前国内外矿山普遍存在的矿岩大块二次破碎问题的新型高效设备。
High-energy hydraulic hammer with liquid cushion is a new and highly efficient equipment used for the secondary breaking of ore boulder occurred very often in domestic and foreign mines.
液垫式高能液压碎石器是解决目前国内外矿山普遍存在的矿岩大块二次破碎问题的新型高效设备。
应用推荐