The difference lies in the comb. Promaster MR350 has the metal comb and so large voice.

区别可能就是琴格质地了吧，350是金属的嘛，声音大的多。

youdao

Or like marimbas only with a funny little plucked sound to it like if you were running your fingers across the teeth of a metal comb.

或是木琴，轻轻地一拨弦，发出如同手指滑过金属梳齿的声音。

youdao

The metal curry comb is not to be used on the horse's body.

金属制马梳不是使用在马身上的。

youdao

Other finds include the bone comb once used by an image conscious lough dweller and a metal blade which is still sharp after hundreds of years.

BBC: nit comb