stepra继代
stepn.步骤;台阶;舞步;步伐v.踏;以步测量
step type multimode fibre阶跃型多模纤维
step-and-repeat camer分部重复照相机
Step and spiral-orifice阶梯螺旋孔口
step-wedge penetrameter[医] 楔形梯级式透度计
step and repeat equipment步进重复装置
step-by-step selector步进式选择器
Step-by-step strategy分步实施步骤