European technical supervision: German ROSLAU strings, German FFW hammers, solid wood reinforced spruce soundboard, solid wood 19-layer peg board, oriental solid wood action, ebony black key solid wood keyboard, reinforced middle plate, thickened five-back Column, original special hydraulic slow down, environmental protection paint, solid wood pedal linkage
技术监制：德国ROSLAU琴弦、德国FFW榔头、实木增强型云杉音板、色木19层弦轴板、东方全实木击弦机、乌木黑键实木键盘、加强型中盘、加厚五背柱、原装专用液压缓降、环保油漆、实木踏板联动