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switch cam：超针闸刀

switch cabinet 开关柜 | switch cam 超针闸刀 | switch cargo 转手货物

switch, canopy：(电车 )总开关

按钮开关 switch, button | (电车 )总开关 switch, canopy | 换向开关;换路开关 switch, change-over

chain-pull switch：拉线开关

chain billet switch 链式坯料分配器 | chain-pull switch 拉线开关 | challenge switch 振铃电键; 呼叫开关

switch, derailing：脱轨转辙器

延时开关 switch, delay-action | 脱轨转辙器 switch, derailing | 双断开关 switch, double-break

direction switch：方向开关,升降开关

direction control switch 换向开关 | direction switch 方向开关; 升降开关 | disable switch 禁止开关

double-throw disconnecting switch：双投隔离开关

double-pole double throw switch 双刀双掷开关 | double-throw disconnecting switch 双投隔离开关 | double-throw switch 双投开关; 双掷开关

door switch：门动开关; 门开关

door interlock switch 门锁开关 | door switch 门动开关; 门开关 | double bladed knife switch 双闸刀开关

switch, double-break：双断开关

脱轨转辙器 switch, derailing | 双断开关 switch, double-break | 双极开关 switch, double-pole

switch; double-pole double-throw：双极双向开关

"switch; double pole","双极开关" | "switch; double-pole double-throw","双极双向开关" | "switch; double-pole single-throw","双极单向开关"

switch; double-pole double-throw：双极双投开关

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

Camphorwood：香樟

camphor oil 樟脑油 | camphorwood 香樟 | camp process 水泥保护木柱法

platinum resistance thermometer sensor：铂热电阻

plateau,平台;坪 | platinum resistance thermometer sensor,铂热电阻 | playback apparatus,回放仪