| 摘要 |
<p>The pointed tip (24) of a sewing machine needle (14) is immersed in a liquid lubricant (37) as it reaches the lower end of its downward stroke through the material (22) being sewn, so as to coat the tip of the needle with a lubricant and reduce the friction and therefore the heat generated by the friction between the needle and the material being sewn. </p> |
