A.穩(wěn)定 B.抗拉 C.抗壓 D.自由伸縮
A.較低一端 B.中間 C.較高一端 D.車(chē)站一端
A.80mm*80mm*5mm B.80mm*80mm*8mm C.110mm*110mm*5mm D.110mm*110mm*8mm