双锥退(tui)(tui)(tui)回(hui)重力(li)作(zuo)用(yong)(yong)烘(hong)干(gan)(gan)器(⛦qi)身略如(ru)(ru)橄榄状(zhuang)，两端(duan)有(you)盖(gai)，里面设(she)两轴以支承器(qi)身。器(qi)身有(you)夹(jia)套以煮沸(fei)，烘(hong)干(gan)(gan)时器(qi)身可退(tui)(tui)(tui)回(hui)，使(shi)材(cai)(cai)(cai)料(liao)与(yu)器(qi)壁时不(bu)时换接觸，抑制了(le)重力(li)作(zuo)用(yong)(yong)真空系统烘(hong)箱中(zhong)材(cai)(cai)(cai)料(l🅰iao)大(da)部(bu)分靠煮沸(fei)筒(tong)抗扰而热错误率低的问(wen)题。退(tui)(tui)(tui)回(hui)重力(li)作(zuo)用(yong)(yong)烘(hong)干(gan)(gan)器(qi)在精(jing)致细密煤化(hua)工机械、制药等层面已选(xuan)用(yong)(yong)吴方言，对107硅橡胶粘(zhan)度大(da)或在退(tui)(tui)(tui)回(hui)流(liu)程中(zhong)粘(zhan)接性(xing)强的材(cai)(cai)(cai)料(liao)不(bu)舒服(fu)用(yong)(yong)。该设(she)配大(da)部(bu)分应(ying)用(yong)(yong)做(zuo)制药，煤化(hua)工机械、物品(pin)等制造业 的膏(gao)状(zhuang)、粒状(zhuang)及(ji)纤维板状(zhuang)材(cai)(cai)(cai)料(liao)的精(jing)提、混合式(shi)、烘(hong)干(gan)(gan)及(ji)需(xu)高低温烘(hong)干(gan)(gan)的材(cai)(cai)(cai)料(liao)（如(ru)(ru)生物化(hua)学制作(zuo)品(pin)等），更(geng)常应(ying)用(yong)(yong)做(zuo)易脱色、易挥发性(xing)、热敏性(xing)强伤害性(xing)、制癌(ai)性(xing)材(cai)(cai)(cai)料(liao)和不(bu)允(yun)许的被破坏结晶的材(cai)(cai)(cai)料(liao)的烘(hong)干(gan)(gan)。