查询词典 pole-vault

pole reverser：极性转换开关

pole pitch 极距 | pole reverser 极性转换开关 | pole shoe 极靴

pole reverser：换极器,换极开关

pole pruning saw 长杆修树枝锯 | pole reverser 换极器,换极开关 | pole ring 磁极环

pole shader：极帽

pole piece 极靴 | pole shader 极帽 | pole-changing 变换极性的

pole shutoff：关闭杆

pole man 云梯操纵手 | pole shutoff 关闭杆 | pole top transformer 杆顶变压器

single-pole double-throw switch：单刀双投开关

single-pole distribution switch 单极分路开关 | single-pole double throw switch 单刀双投开关 | single-pole enclosed fused switch 单极保护式负荷开关

single-pole double-throw switch：单刀双投开关; 单刀双掷开关

single-pole distribution switch 单极分路开关 | single-pole double throw switch 单刀双投开关; 单刀双掷开关 | single-pole enclosed fused switch 单极保护式负荷开关

double pole single-throw switch：双极单投开关

double-pole double-throw switch 双极双投开关 | double-pole single-throw switch 双极单投开关 | double-pole switch 双极开关

three pole single-throw switch：三刀单投开关

three pole knife switch 三极闸刀开关 | three pole single-throw switch 三刀单投开关 | three pole switch 三刀开关

three pole single-throw switch：三刀单掷开关

three-pole knife switch 三极闸刀开关 | three-pole single-throw switch 三刀单掷开关 | three-pole switch 三刀开关

denchuu; telephone pole; telegraph pole; lightpole：電柱

天柱tenchuu; pillars supporting heaving | 電柱denchuu; telephone pole; telegraph pole; lightpole | 鼻柱hanabashira; septum; bridge of the nose

haulage device：拖曳设备;运输设备

haul road 运料路;拖运材料的道路 | haulage device 拖曳设备;运输设备 | hazardous slope 危险斜坡

Let sb. in：让某人进

8.be late for school上学迟到 | 9.let sb in让某人进 | 11.travel around the world环游世界