Stepka斯乔普卡stepn.步骤；台阶；舞步；步伐v.踏；以步测量step load and unload分级加卸载Step size refinement步长精炼技术step down the ladder走下梯子step by step welding跨步焊法step-track antenna步进跟踪天线Stephania dentifolian.齿叶地不容step bearing bracket立式止推轴承托架step by step advance层次推进step pulse generator阶跃脉冲发生器step by step dialing步进制拨号