Junka云卡junkn.垃圾；废旧杂物；中国平底帆船vt.丢弃junk and sail-boat model木船模型Junker's water dynamometer青年董事会Junker rs water dynamometer容克水力测功器Junker's water flow calorimeter次要梁Junk Bay Sewage Treatment Works将军澳污水处理厂Junker rs water flow calorimeter容克水流量热器