|shentu發(fā)表于 05-12 16:24<img src="http://e-learninguniversity.com/data/attachment/forum/202205/12/162414olxtxbxbd66x4h77.png" border="0" alt=""><img src="http://e-learninguniversity.com/data/attachment/forum/202205/12/162414j36e5whhh5egm7x3.png" border="0" alt=""><img src="http://e-learninguniversity.com/data/attachment/forum/202205/12/162414jpi3313r3r3empp3.png" border="0" alt=""><br>
|dtltc123發(fā)表于 05-12 16:451/4-20UNC美制螺紋
|tianji2wn發(fā)表于 05-12 17:59公稱直徑1/4寸,導程1/20寸,沒記錯的話應該是這個樣子
|斯文少弟2018發(fā)表于 05-12 18:31怎么知道是粗牙、細牙,圖紙上沒有標注處UNC和UNF。 是像公制一樣,不特別標注,就是默認粗牙嗎?
歡迎光臨 機械社區(qū) (http://e-learninguniversity.com/) | Powered by Discuz! X3.4 |