The field links you choose must include between 1 and 5 key fields and at least one non-key field.
所选的字段链接必须有1到5个关键字字段和至少一个非关键字字段。
If no primary key is specified, the default-partitioning key is the first non-long field column defined on the table.
而如果没有指定主键，默认的分区键则为该表上所定义的第一个不为long字段的列。
The field application indicated that the lifting liquid viscosity, pumps the diameter are key factor influencing lifting capacity of oil extraction system of non-tubing.
现场应用表明，举升液体粘度、泵径是影响无油管采油系统举升能力的关键因素。
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