... top speed 最高速度 top structure area 构造顶部区域 top sub 上部接头 ...
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Top is columniform structure, and bottom is coniform structure. With covering small area and storing large capacity of lead oxide, it can realize lead oxide first in and out.
粉仓上部为圆柱形下部为圆锥形结构，储粉量大、占地面积小，能实现铅粉先进先出。
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