| 摘要 |
Described is a roller shaft made of grey iron with a circumferential striped forming channels with a first and a second sides that form a crest or apex; the crest of the "V" channels, which are spaced in a regular manner, has a case for housing a shield welding 4040 of 3/32 (0.238 cm), said case being defined by a lateral rectangular housing and a truncated upper apex, the height of said shield being of 3/8 (0.952 cm).
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