 | World's Columbian Commission - 1891 - Страниц: 134
...appliances for delivering ores. Methods and appliances for ventilating, lighting and signaling. GROUP 61. BORING AND DRILLING TOOLS AND MACHINERY, AND APPARATUS FOR BREAKING OUT ORE AND COAL. Class 381. Picks, gads, and hammers. Class 382. Hand-drills, hammers, and blasting implements. Class... | |
 | United States. World's Columbian Commission - 1891 - Страниц: 134
...appliances for delivering ores. Methods and appliances for ventilating, lighting and signaling. GROUP 61. BORING AND DRILLING TOOLS AND MACHINERY, AND APPARATUS FOR BREAKING OUT ORE AND COM,. Class 381. Picks, gads, and hammers. Class 382. Hand-drills, hammers, and blasting implements.... | |
 | 1893 - Страниц: 436
...clocks, etc. (see also group 151). Group 101—Fabrics of jute, ramie and other Group til—Boring and drilling tools and machinery, and apparatus for breaking out ore and coal. Group 63—Moving, storing and delivering ores, coals, etc. Group 62—Pumps, engines and apparatus... | |
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Boring and drilling tools and machinery, and apparatus for breaking out ore and coal. 