Confidential trucks are different from container trucks in that they are not separated into frame and trailer.
Secret bucket composition
A secret bucket truck can be divided into these parts:
The bottom and front of the truck (port name: car array and front)
A cargo hopper
A lifting board (called "tail board" in Hong Kong)
The secret bucket truck can be divided into the following tonnage:
5.5 tons or less (minivan)
7.5 tons, 8.0 tons, 8.5 tons, 9.0 tons, 9.5 tons, 10 tons, 13 tons (medium trucks)
16 tons, 24 tons, 30 tons (heavy trucks)