Special Agents Series, 第 133-143 期U.S. Government Printing Office, 1917 |
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第 1 到 5 筆結果,共 51 筆
第 17 頁
... Fiber- plaited socks have not usually proved satisfactory , as they do not give service commensurate with the cost . The artificial silk soon assumes a very rough appearance , owing probably to climatic con- ditions and laundry methods ...
... Fiber- plaited socks have not usually proved satisfactory , as they do not give service commensurate with the cost . The artificial silk soon assumes a very rough appearance , owing probably to climatic con- ditions and laundry methods ...
第 20 頁
... fiber mats and other articles that might be produced from coco fiber , but a movement is now on foot looking toward the estab- lishment of a cotton mill . If the purchasing power of the people became greater because of increased ...
... fiber mats and other articles that might be produced from coco fiber , but a movement is now on foot looking toward the estab- lishment of a cotton mill . If the purchasing power of the people became greater because of increased ...
第 9 頁
... fibers . Within the past five years rubber has been culti- vated on a commercial scale , and according to latest estimates about 50,000 to 60,000 acres have been planted in it , principally in the southern coast districts . Palm sugar ...
... fibers . Within the past five years rubber has been culti- vated on a commercial scale , and according to latest estimates about 50,000 to 60,000 acres have been planted in it , principally in the southern coast districts . Palm sugar ...
第 34 頁
... fiber used in this material is imported through the United States from Canada , while the Portland cement comes from the United States . The material may be applied to either wood or iron roofing frames . The weight of the shingles per ...
... fiber used in this material is imported through the United States from Canada , while the Portland cement comes from the United States . The material may be applied to either wood or iron roofing frames . The weight of the shingles per ...
第 44 頁
... fiber brush . Since there is much humidity in the air not much dust is noticed except in the dry season . In special cases , how- ever , as in factories , vacuum cleaning systems would be useful . DAMP AND WATER PROOFING MATERIALS ...
... fiber brush . Since there is much humidity in the air not much dust is noticed except in the dry season . In special cases , how- ever , as in factories , vacuum cleaning systems would be useful . DAMP AND WATER PROOFING MATERIALS ...
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