英语翻译Custody Transfer Metering Skid and Prover Skid这是一段的标题.段内

英语翻译
Custody Transfer Metering Skid and Prover Skid
这是一段的标题.段内没有相关释义.能翻译一下这句话吗
Custody Transfer Metering Skid and Prover Skid
尤其是skid这个词。
附上此标题下的完整段落：
One of FIT-01921A(这是个仪表下同) and FIT-01921B will send signal to flow control valve FV-091911 to control the flow of oil export.Another one will be spared.
Also,there is a prover flow with prover skid and water prover skid,the control loops will be finished based on the flow computer of the Custody Transfer Metering Skid.They will be finalized based on the information from the Vendor(HOLD).