hwSlotType
1.3.6.1.4.1.2011.6.3.3.2.1.2
Board type, which is defined in HUAWEI-TC-MIB.mib.
The board type supported by a slot varies. For example, a slot can be inserted with a power board only,
but certain slots can be inserted with voice service boards and broadband service boards.
When adding a board by using the hwSlotRowStatus,
you need to specify the board information such as board type and slot number.
When adding a board, you need to check whether the board can be inserted in the specified slot.