hot funnel

... hot filter 保温漏斗 hot funnel 保温漏斗 hot melt adhesive 热熔性胶粘剂 ...

 double-walled funnel

... 复溶剂精制 double-solvent refining 夹层漏斗；保温漏斗 double-walled funnel 双线；双值 doublet ...