【正文】 .............................................................................................................................................................................20 倒角 ..............................................................................................................................................................................................21 45O 倒角標注 .......................................................................................................................................................................21 非 45O 倒角標注 ..............................................................................................................................................................22 相同的孔、槽 ..............................................................................................................................................................................23 孔和孔組 ......................................................................................................................................................................................24 銷孔 ..............................................................................................................................................................................................25 對稱結構 ....................................................................................................................................................................................26 參考尺寸和鏈式尺寸 ................................................................................................................................................................27 參考尺寸標注 ....................................................................................................................................................................27 鏈式尺寸標注 ....................................................................................................................................................................29 尺寸公差 ....................................................................................................................................................................................30 線性公差 ............................................................................................................................................................................30 角度公差 ............................................................................................................................................................................31 未加工毛面尺寸 ................................................................................................................................................................32 其他類別 ....................................................................................................................................................................................33機械制圖正誤解析圖冊 目 錄三一集團有限公司 3 板厚標注 ............................................................................................................................................................................33 管螺紋標注 ........................................................................................................................................................................34 最小彎邊高度 ....................................................................................................................................................................35 乘號的標注 ........................................................................................................................................................................36 尺寸標注不全 ....................................................................................................................................................................37 測量基準選擇不合理 ........................................................................................................................................................38第 4 章 幾何公差 ...................................................................................................................................................................................39 公差框指引線 ..............................................................................................................................................................................40 公差值 ..........................................................................................................................................................................................42 同軸度公差 ..........................................................................................................................................................................42 形狀公差值與位置公差值 ..................................................................................................................................................45 公共公差帶 ............................................................................................................................................................................47 被測要素 ......................................................................................................................................................................................48 基準標注 ......................................................................................................................................................................................49 一般規(guī)定 ................................................................................................................................................................................49 公共基準 ..............................................................................................................................................................................53 基準選擇 ..........................................