关于Nominal intra-cell guard bands for wideband operation

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3GPP阅读中的一个疑问：下表是表示什么含义？ 不理解，请大佬来解惑

Table 5.3.3-2: Nominal intra-cell guard bands for wideband operation

SCS (kHz)	40 MHz	60 MHz	80 MHz
15	105-6-105 (216)	N/A	N/A
30	50-6-50 (106)	50-6-50-6-50 (162)	50-6-50-5-50-6-50 (217)
60	23-5-23 (51)	23-5-23-5-23 (79)	23-5-23-5-23-5-23 (107)
NOTE 1:        The intra-cell guard band is denoted TBW0-GB0-…-GBN_RBset-2-TBWN_RBset-1 for N_RBset > 1 number of RB-sets with TBWr the maximum transmission bandwidth (PRB) of RB-set r and GBr the guard band (PRB) above the upper edge of RB-set r. The RB-set 0 is starting at the first common resource block (CRB) of the carrier as indicated by offsetToCarrier. The total transmission bandwidth configuration (size of resource grid) including guard bands is given in between parentheses.