| 摘要 |
Apparatus for spraying maintenance enhancing material onto the periphery of a tubular member positioned above a ground surface, that comprises means for generating spray onto the periphery of the tubular member means for delivering maintenance enhancing material to the spray generating means and means for positioning the spray generating means in such a way that the periphery of the tubular member is completely impinged by the spray issuing from each spray generating means and that a line corresponding to the shortest distance of a spray issuing from the spray generating means to the periphery of the tubular member is not necessarily colinear with the radius of the tubular member.</S DOAB>
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