1·While for the equipment structure, they were the sectional area of nozzle, the pitch between screw and its turnbuckle, clearance, rotate speed, and the depth of the whorl on the turnbuckle.
就设备的结构而言：喷嘴的截面积、螺杆与螺套的螺距、间隙、转速、螺套螺纹的深浅是影响膨化度的主要因素。
2·Mechanisim of hot-core box non-occupying coating process, its practical effects on manufacturing the whorl shell core, and its technical essentials have been summarized in detail.
介绍热芯盒法非占位涂料技术的原理，及其在制备螺纹壳芯中的应用效果，并归纳总结其工艺要点。
3·The processing method for inside whorl of middle and small hole is introduced.
介绍了中小孔径内螺纹的加工方法。
4·It is joined, inserts helping jointly that its characteristic is whorl, the price is suitable.
其特点是螺纹连接、插合方便、价格适宜。
5·Objective: To compare the effect of Clinical indication of the detached foundry metal pile nuclear crown and whorl mercury metal pile nuclear crown in the reparation of the molar.
前言：目的比较分体式铸造金属桩核冠和螺纹金属桩银汞核冠修复磨牙的临床适应症与修复效果。