Stone repair defects in a series of sales of their systems, a series of protective materials, a series of stone cleaning, renovation stone series stone series safeguard and protect machinery.

销售其系统的石材缺陷修复系列、石材防护系列、石材清洗系列、石材翻新系列、石材维护系列和维护机械。

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"Some people procrastinate cleaning. Some people procrastinate by cleaning," says Professor Peter Stone.

“有些人会拖延打扫卫生。有些人通过打扫卫生来拖延。”彼得·斯通教授表示。

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Used for memorial tablet tower etc natural stone, can prevent lichen growth, keep surface cleaning.

用于纪念性碑塔等天然石料上，能防止青苔的生长，保持表面清洁。

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The problem appears to be worst in Scotland, particularly in Glasgow, where millions of taxpayers' pounds were spent subsidising stone-cleaning as part of the city's post-industrial renaissance.

ECONOMIST: Conservation