| 摘要 |
1527579 Scraper conveyers JOY MFG CO 30 March 1977 [31 March 1976] 13320/77 Heading B8A A scraper 10 is formed of two half-portions 16, each of which is secured to a pair of links 18 of the conveyer's chain 14 by bolts 30, 30. A further bolt 40 also connects the two portions 16 but passes above the chain, all three bolts are secured to the scraper portions by welding. |
