转向灯继电器（顶端识别号为21）的英文

turn signal lamrelay

• 转向:    lose one's bearing ...
• 灯:    lamp; lantern; lig ...
• 继电器:    electric relay; re ...
• 顶端:    spire; top; apex; ...
• 识别:    discriminate; dist ...
• 号:    howl; yell
• 为:    support; stand for