I wrote:
Figure 1 shows a single piece pallet car.
Suppose there is a train of pallet cars called traveling grate [you may refer to this question], but I want to point an isolated one which is not in the train to show its structure...
Can I use piece this way? or it is just for uncountable words like information, equipment...
My question is actually two parts, one about the usage of "piece" and one about a word for a piece of equipment detached from a bigger structure consisting of several of them.