?主要成分

... 虫胶蜡 其主要成分是从介壳虫分泌物提蜡。 shellac wax 主要成分 backbone; bases; basis; chief constituent; dominant ingredient; dominant sector; essential component; key component; main components; major constituent; predominating constituent; primary components; principal components; principal ingredient; staple 粉料主要成分 formula main component ...