按JB/T7977-99標準製造，材質為HT200-250，此ci種zhong材cai質zhi的de鑄zhu鐵tie平ping行xing平ping尺chi在zai工gong業ye生sheng產chan中zhong得de到dao廣guang泛fan應ying用yong。工gong作zuo麵mian采cai用yong刮gua研yan或huo精jing密mi磨mo削xue工gong藝yi
，用yong於yu機ji床chuang檢jian驗yan中zhong檢jian驗yan不bu平ping度du和he不bu直zhi度du兩liang個ge工gong作zuo麵mian是shi配pei合he塊kuai規gui
，千qian分fen尺chi，水shui平ping儀yi等deng儀yi器qi檢jian驗yan
，不bu同tong高gao度du，兩liang導dao軌gui的de平ping行xing和he不bu連lian接jie導dao軌gui的de水shui平ping，並bing可ke以yi配pei合he直zhi角jiao尺chi，檢jian驗yan隻zhi用yong直zhi角jiao尺chi無wu法fa檢jian驗yan的de兩liang機ji件jian的de垂chui直zhi度du的de量liang具ju，還hai適shi用yong於yu設she備bei安an裝zhuang和he檢jian查zha，使shi用yong溫wen度du（20±5）℃