tube face meaning in Chinese

灯管座
灯泡座
管泡表面

Brass leaves are musical instrument of wind . after rotation , the opening of the tubes faces the coming wind
鸣帆犹如管乐器，当铜片转向后，铜管口便面向风。
After rotation , the opening of the tubes faces the coming wind . according to sound principle , longer tubes create lower pitches and vice versa
鸣帆犹如管乐器，当铜片转向后，铜管口便面向风。