Why do they need two different types of doors? Like, what's the benefit in between?
@TUbe-bv4fy9 ай бұрын
JR first introduced the screw-and-nut type (designed by Faiveley Transport), and later introduced the linear motor type. The screw-nut type is quiet, but the linear motor type has a simple structure and fewer sliding parts, so frequent lubrication is not necessary.