(A)耐高溫 (B)耐磨 (C)耐腐蝕 (D)耐毒水
(A)制動(dòng)器 (B)梯首 (C)梯腳 (D)鉤齒
(A)0.8~0.9m (B)0.8~1.0m (C)0.8~1.2m (D)0.8~1.3m