| 单词 | Para rubber |
| 例句 | Special features is a "belly" of Para rubber in lieu of a ballonet. Jane's All the World's Aircraft 1913 2011-01-04T03:01:14.690Z The State has about 10,000 acres of test plantations, mostly Para rubber, cotton, and cacao, in various parts of the Colony. An African Adventure Hevea brasiliensis.—A tree of tropical America growing in damp forests, especially in the Amazon valley, which, together with other trees called siphonia furnish the Para rubber, or American caoutchouc. Catalogue of Economic Plants in the Collection of the U. S. Department of Agriculture The present price of India rubber varies from 75 cents per pound for fine Para rubber to 45 cents per pound for the cheapest grade. Scientific American Supplement, No. 1157, March 5, 1898 From dynamo switches to bus bars and from bus bars to group and feeder switches, vulcanized rubber insulation containing 30 per cent. pure Para rubber is employed. The New York Subway Its Construction and Equipment I rejoice to think that I am a Prince-Hyde valve, with best Para rubber facings. McClure's Magazine, Vol. 6, No. 4, March, 1896 In addition to coffee and cacao attempts are being made in Congo Français to introduce the Para rubber tree, a large plantation of which I frequently visited near Libreville, and found to be doing well. Travels in West Africa A solution of the artificial rubber in benzine left on evaporation a residue which agreed in all characteristics with the residuum of the best Para rubber similarly dissolved and evaporated. Scientific American Supplement, No. 1157, March 5, 1898 |
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