couche d’aluminium
/kɔʁdˈɔ̃ dalimɑ̃tasjˈɔ̃ sɛktˈœʁ/
n
English: aluminum layer · 铝层
Sens：The surface of the disc is covered with a thin layer of aluminum, which reflects the laser beam toward the sensor.
English: aluminum layer · 铝层