词汇	parallel twin
释义	parallel twin 平行双晶
随便看	operating draft operating costs operating-costs operating cost system operating covenants operating coveralls operating crank operating crew operating criteria operating current operating current of gyro motor operating current range operating current voltage operating curve operating curve rules operating cycle Operating Cycle Flexibility operating cycles operating cycles counter operating cycle time operating cylinder operating cylinder piston operating cylinder piston head operating cylinder piston pin operating cylinder piston ring