多管下降炉
multi-heater bridg man furnace
下降管
vertical descendant tubes
downtake
downcomer
vertical pipe
dip tube
down-comer
downflow
down pipe
1B托卷辊下降控制
cradle roll 1B lowering control
derivative-free下降算法
derivative-free descent algorithm
Fermat下降法
Fermat’s method of descent