胎冠与胎侧之间的过渡区。由于胎面弧度小而胎体帘线层弧度大，成型时胎面两侧下部必须用胶料填充，从而在此处形成胎肩。
分析全钢载重子午线轮胎胎冠、胎侧、胎肩和胎圈部位外观明疤的产生原因，并提出解决措施。
The causes for the appearance defects on crown, shoulder and bead areas of BTR tire were analyzed and their countermeasures were proposed.
糖尿病孕妇的胎儿也可能有与胎头不相称的肩宽或躯体过大。
The fetus of the diabetic gravida may also have disproportionately large shoulders and body size compared with the head.
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