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One Lump or Two - by Malcom Bates
Next to the regular collection of domestic waste, there is perhaps no better sign of a civilized society that the cleanliness of its streets. But there's a heated debate-taking place at present, between the exponents of traditional twin-engine truck-mounted highway sweepers and those who suggest that a single engine format is the way forward. This debate is a complex one, but there are signs that the single-engine concept is gaining ground.
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