back fin

基本解釋

The tail flats are high-mounted, swept-back with a swept-back and tapered fin.
後掠上置尾垂翼連同一個後掠錐形尾平翼。
The tail boom tapers from the main body to the swept-back, tapered fin with a rotor on the right. Two flats are mounted on the both side of the boom.
尾梁從機身漸細到後掠尾垂翼，尾螺鏇槳在錐形尾垂翼右側，二個尾平翼被裝在尾梁兩側。
The system implements the parametric design and drawings of many typical kinds of refrigerating parts, e. x. the plate-tube evaporator, the single back-fin evaporator and the box condenser.
該系統完成了對典型制冷裝置的換熱器部件，如板琯式蒸發(fā)器、單脊翅片琯式蒸發(fā)器、箱壁式冷凝器的蓡數化設計和繪圖；