Flashing instructions instructions

All IMG files are forbidden to be flashed to the BOOT partition !!!!!!

[BOOT]: 
1.Use 'fastboot boot rec.img' to temporarily boot into TWRP !!!
2.VAB device: Advanced - flash into the current TWRP / install recovery ramdisk

[REC]: 
1.Only flash into the recovery partition: 'fastboot flash recovery|recovery_ab|recovery_a|recovery_b rec.img'
2.Boot to twrp: fastboot reboot recovery

[REC_BOOT]: [BOOT] + [REC]