Azure Trace for Packing 2020. How to identify the vmType?

Hi,

In the dataset Azure Trace for Packing 2020, I find that the sheet "vm" has a column "vmTypeId", but in the sheet "vmType" there are many vm types with the same "vmTypeId" but different "machineId". So I'm confused how to indentify the type of a vm in the sheet "vm", because it does not the machineId information.

Thanks a lot.