目的回纹型风湿症转归和预后。
Objective Progression and prognosis of palindromic rheumatism.
方法：利用遗传流行病学方法研究济宁市区60对双生子的指纹纹型。
Methods: The fingerprint patterns of 60 twins were examined by means of genetic epidemiologic methods.
具有较大环形面积的凹纹型面使流体流量下降，并使碎片落入位于工具底部的篮或接受器内。
An indented profile creating a larger annular area causes the fluid flow rate to drop and allows debris to drop into a basket or receptacle located at the base of the tool.
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