European technical supervision: German ROSLAU strings, German FFW hammers, Chuanya solid wood reinforced spruce soundboard, solid wood multi-layer composite peg board, Oriental solid wood action, solid wood reinforced keyboard, original special hydraulic slow down, anti-corrosion Oxidized hardware, environmentally friendly paint.
欧洲技术监制：德国ROSLAU琴弦、德国FFW榔头、川雅实木增强型云杉音板、色木多层复合弦轴板、东方全实木击弦机、实木增强型键盘、原装专用液压缓降、防氧化五金件、环保油漆