HDJS - Ⅱ mold two melt top bridges employ fix and join melt structure, fix melt not have cone process demand , be apt to make, operate same ordinary alike, possess of trait structure simple and nimble convenient and safe reliable .

The geological feature of Shuangding mineral estate of Linglong gold field and its regularity of gold enrichment;

Methods The thickness of the soft tissue of humerus head,biparietal diameter (BPD),femur length (,humerus length (HL) in 478 normal pregnant women (gestational time:38～40 weeks) were measured by B-US.

The circle of head outline is automatically obtained by hough transform, and its diameter is approximately equal to the biparietal diameter.