bay windows 里面是石头的，哈哈，从来是五谷不分的我，今天才发现，
由于不放心明天来干活的handman说的用水泥修补，我google了好久专业的修补办法，
慢慢我发现原来市场上有这种专业的石材修补材料，全名是：
Toupret Touprelith F Exterior Masonry Repair Filler
• Do not apply on warm, overheated surfaces.
• Do not apply in sun exposure.
• In hot and dry weather conditions, generously moisten the
surface before and after coating.
• The setting of the paste depends