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Item The importance of feeding rates in Rotorvane manufacture(The Tea Research Institute. Talawakele, 1965) De Silva, W.C.A.Item Rubberwood hardboard as panels for tea chests(The Tea Research Institute. Talawakele, 1966) Kirtisinghe, D.; De Silva, W.C.A.Item The influence of the degree of wither in rotorvane manufacture of high grown leaf(Tea Research Institute. Thalawakele, 1966) De Silva, W.C.A.; Kirtisinghe, D.