连接件内装的螺钉，端头部制成与连接件斜面相匹配的圆锥形；
本论文主要研究半波长圆锥形超声聚能器的设计和应用。
1·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。