词汇	选择加氢
释义	选择加氢 selective hydrogenation
随便看	traffic signal mark traffic signal monitor system traffic signal off-line control traffic signal off-line timing Traffic signal optimization traffic signal phasing-sequence traffic signal priority traffic signal, road sign traffic signals traffic signals control system traffic signals coordination traffic signal setting traffic signal structure-regulation traffic signal system traffic signal timing traffic signal warrant traffic signal wireless control system traffic sign and marking traffic sign board manufacturing technology traffic signdeprecated traffic sign detection traffic sign image traffic sign placement traffic sign post traffic sign recognition