侧方移位
参考答案：
两骨折端移向侧方，四肢按骨折远端、脊柱按上位椎体移位的方向来区分。
准备律
A device fitted over the discharge opening on a relief valve consisting of one or two woven wire fabrics is called a（）.
A.flame stopper
B.flame screen
C.flame filter
D.flame restrictor
