The u channel needs to fit inside itself when perpendicular to each other if you turn the U channel
问题描述：
The u channel needs to fit inside itself when perpendicular to each other if you turn the U channel
The u channel needs to fit inside itself when perpendicular to each other ,if you turn the U channel side ways it needs to fit inside the base plate of the U
答
当你转动U型管道让它们互相垂直的时候,需要从内部接合
这句话好别扭,既然有EACH OTHER,U CHANNEL这个词为什么要是单数