天气预报15天查询> 其他> 怎样在圆管上开圆孔

怎样在圆管上开圆孔

更新时间: 2020-11-12 00:00:00     

1、首先,两个圆柱交线不是一个平面曲线,也就不是椭圆了。

2、不过从你发的黑三通图上看去,就是侧脸,交线是那是两条垂直的直线相交。所以可以从侧面看,从侧面画,然后做一个纸的等腰直角三角形,三角形的图形和交线的测视图一样,然后用铅笔一点一点描,和三角形两个直角边重合。

关键词: 怎样

如有意见、反馈、侵权或投诉等情况,请联系:

电话:
邮箱:

我们将会在48小时内给与处理!

版权所有 Copyright ? 2009-2020 tianqiyubao3.com

页面:/news/view-2857206/ | 耗时:0.6312 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=2857206 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2857206 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2857206 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1125099,200299,1086097,1110914,238776,1125021,2617646,1099075,1078477,1123673,165616,3044461,2298020,3157066,1125500,1117345,320295,2985478,115308,326129,120440,470870,1127521,195058,3287012,1926533,1881957,1371139,1069729,1112280) ORDER BY field (ArticleID,1125099,200299,1086097,1110914,238776,1125021,2617646,1099075,1078477,1123673,165616,3044461,2298020,3157066,1125500,1117345,320295,2985478,115308,326129,120440,470870,1127521,195058,3287012,1926533,1881957,1371139,1069729,1112280)