关于传导率因子TRANLK与TRANSK的区别

如题，关于这两个关键字帮助文档没有看明白。求解释。谢谢。
Flow between grid blocks is proportional to a cross-sectional inter-block flow area, an averaged permeability value, and a divisor equal to the inter-block distance. These terms combine to form a transmissibility which is calculated in the simulator. Before this transmissibility is used, a multiplier is applied. The multiplier can be set using the *TRANSI, *TRANSJ, or *TRANSK keywords (as described elsewhere) or the *TRANLI, *TRANLJ, or *TRANLK keywords described here.
All transmissibility multipliers are dimensionless.
Transmissibility multipliers can be specified for any grid block. A default value of 1.0 will be used for unspecified multipliers.
When transmissibility multipliers appear in recurrent (well) data, any block’s multipliers may be (re−)assigned, BUT unreferenced blocks retain their values assigned earlier (which will be 1.0’s if no other values were ever assigned).
Since two blocks enter into any inter-block flow calculation, a method is required for deciding how blocks will contribute multipliers.
If flow between a pair of blocks is considered, it is the block with the highest I index for an I direction pair, or the highest J index for a J direction pair, or the highest K index for a K direction pair, that supplies multiplier values set by the *TRANLI, *TRANLJ, or *TRANLK keywords, respectively. This behavior is the opposite of the assignment of multipliers based on the *TRANSI, *TRANSJ, or *TRANSK keywords, where the lower indexed block in the pair supplies the multiplier.