内部边 meaning in Chinese

interior edge

Now , in the european way , you glue the lining first to the sides , and then you adjust those sides to the neck
现在在欧洲的制程，你先把内部边条黏在侧板上，再调整侧板和琴颈的位置接合在一起。
I put the braces on and i put on the sides and glue the inside linings , the diamonds that hold the sides with the top
我黏上力木和放好侧板，然后开始黏上内部边条，三角形支撑木黏把侧板和面板固定在一起。