多级数据定义

differential pump (multistage pump, multi-cellular pump, step piston pump)

multistage thin-film scan generator

multistage pulsed-bed contactor

multistage pressure apparatus【物】

multistage grouping【统计】

multistage rectification【测】

multistage tube

many stage【数】;multistage【科技】;multistep【科技】