查询词典 step up

step down：减缓的

step-by-step 按部就班的 | step-down 减缓的 | step-in 可穿的

step down transformer：降压变压器

step-by-step system local automatic telephone exchange 步进制市内用自动电话交换机 | step-down transformer 降压变压器 | step-head piston 阶梯顶活塞

Play Step by Step Frame by Frame：单格放映键

Decrease Play Speed 减慢拨放速度键 | Play Step by Step Frame by Frame 单格放映键 | Reverse Play Step by Step Frame by Frame 反向单格放映键

Reverse Play Step by Step Frame by Frame：反向单格放映键

Play Step by Step Frame by Frame 单格放映键 | Reverse Play Step by Step Frame by Frame 反向单格放映键 | Stop 停止键

step size, step length, step width：步长

布西内斯克方程|Boussinesq equation | 步长|step size, step length, step width | 步长指标|step index

step-by-step topics：分步指导的主题

step-by-step procedures 详细步骤说明 | step-by-step topics 分步指导的主题 | stock 常用

watch/mind one's step：当心、小心(走路时)

step into a boat/across a stream 踏入小船;踏进小溪 | watch/mind one's step 当心、小心(走路时) | step by step 逐步地;渐渐地

step feed drill attachment：分级进给钻削附件

step feed 分级进给 | step feed drill attachment 分级进给钻削附件 | step-by-step feed 逐步进给

step-back welding：逆向分段焊接; 后向分段焊接

step-back method of welding分段反向焊法 | step-back welding逆向分段焊接; 后向分段焊接 | step-by-step welding步进焊缝; 跨步焊

step-back welding：分段后退焊法

踏板 step | 分段后退焊法 step back welding | 逐次逼近法 step by step procedure

steam trap valve：疏水阀

球阀 ball valve | 疏水阀 steam trap valve | 蛇管式换热器 serpentine type heat exchanger

aldermanship：市政官

aldermanry 议员 | aldermanship 市政官 | Alderney 乳牛