A.40~60mm B.60~80mm C.80~100mm D.100~120mm
A.綁扎下柱鋼筋→綁扎上柱鋼筋→綁扎牛腿鋼筋 B.綁扎上柱鋼筋→綁扎下柱鋼筋→綁扎牛腿鋼筋 C.綁扎下柱鋼筋→綁扎牛腿鋼筋→綁扎上柱鋼筋 D.綁扎上柱鋼筋→綁扎牛腿鋼筋→綁扎下柱鋼筋
A.25% B.35% C.45% D.50%