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机械制图及公差--PPT编辑档可获取!

2026-07-07 18:54:25

机械制图及公差--PPT编辑档可获取!

体系管理-阅读正文

机械制图及公差

机械制图对图纸格式作了如下规定:

1.必要时可以对上表中的幅面加长、加宽

2.图框必须用粗实线绘制

3.图框的右下角必须画出标题栏、标题栏中的文字方向为看图方向，具体见下图:

比例

在绘图时，我们会根据部品的实际大小选取一定的比例进行绘图，绘图比例有放大比例(如2:1)和缩小比例(如2:1)及1:1比例(一般优先选用1:1比例)

字体

在机械制图中全部采用长仿宋字体进行书写四、图线

机械制图中规定了十五种基本线性，下图为常用的图线使用说明:

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CONNECT:[ UseTime:0.000593s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000893s ]
SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000293s ]
SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000272s ]
SHOW FULL COLUMNS FROM `set` [ RunTime:0.000521s ]
SELECT * FROM `set` [ RunTime:0.000212s ]
SHOW FULL COLUMNS FROM `article` [ RunTime:0.000507s ]
SELECT * FROM `article` WHERE `id` = 526964 LIMIT 1 [ RunTime:0.000452s ]
UPDATE `article` SET `lasttime` = 1783434898 WHERE `id` = 526964 [ RunTime:0.011703s ]
SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000247s ]
SELECT * FROM `article` WHERE `id` < 526964 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000469s ]
SELECT * FROM `article` WHERE `id` > 526964 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002836s ]
SELECT * FROM `article` WHERE `id` < 526964 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000667s ]
SELECT * FROM `article` WHERE `id` < 526964 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000849s ]
SELECT * FROM `article` WHERE `id` < 526964 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001341s ]

0.146256s

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