层门安全开关的英文

• lading door safety switch
• landing sagety edge

• 层:    I storey; tier; stratum
• 门:    entrance; exit; door; gate
• 安全开关:    cut-out device; interlock; s ...
• 安全开关:    cut out device; cutout device; dead front switch; interlock; reliable shutter; safety cock; safety cut off; safety cut-off; safety shutoff; safety switch; safetyswitch
• 电动安全开关:    electrical-safety switch