4 试验方法4.1 一般要求4.1.1 在试验时应注意防止气流、光线和强磁场的影响。4.1.2 在试验前应安装调整好锻压机械,一般应自然调平,其安装水平在纵横向不应超过0.20/1000。4.1.3 在试验过程中,不得调整影响锻压机械性能、精度的机构和零件,否则应复检受了影响的有关项目。4.1.4～4.1.7(略)4.2 外观(略)4.3 附件和工具(略)4.4 参数和尺寸(略)4.5 加工装配质量(略)4.6 安全与防护 4 Test methods 4.1 General requirements 4.1.1 During the test should be taken to prevent air flow, light and strong magnetic field. 4.1.2 Before the test should be installed to adjust forging machinery, the general should be naturally leveling, the level of its installation in the vertical and horizontal should not exceed 0.20 / 1000.4.1.3 During the test shall not be adjusted forging mechanical properties, precision institutions And parts, or they should be re-examined the affected items. 4.1.4 ~ 4.1.7 (omitted) 4.2 Appearance (omitted) 4.3 Accessories and tools (omitted) 4.4 Parameters and dimensions (omitted) 4.5 processing and assembly quality (omitted) 4.6 Safety and Protection