jacketed still

1 2 3 4 5 ... 夹层锅^ jacketed pan 带夹套的釜^ jacketed still 套层注射器^ jacketed syringe ...

it must still be there._百度知道 ... iron still 铁制蒸馏锅 jacketed still 套层蒸馏器 lime still 石灰蒸氨器 ...