问题
单项选择题
Marline is（）.
A.four-stranded sisal line
B.three-stranded cotton line
C.sail twine
D.two-stranded hemp cord
答案
参考答案：D
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Marline is（）.
A.four-stranded sisal line
B.three-stranded cotton line
C.sail twine
D.two-stranded hemp cord
参考答案：D
，覆盖5mm，磨牙远中尖对尖关系，上颌拥挤6mm，下颌拥挤6.5mm