1) machining difficult points
加工难点
1.
The direction and feasible method to solve machining difficult points are discussed.
本文根据光学零件在当今科学技术中的重要作用,阐述了球面及非球面光学零件的各种加工方法及其难点,讨论解决加工难点的方向和可行方法。
2) trapezoidal thread processing difficulties
梯形螺纹加工难点
6) construction difficulties
施工难点
1.
Based on the geological condition,surrounding environment and engineering characteristics of the river-crossing tunnel along the South Tibet Road in Shanghai,this paper analyzes the construction difficulties and potential risks,which involve many factors:complicated geological conditions,variable soil thickness,crossing of the Huangpu River and metro M8,the curved excavations.
基于上海市西藏南路越江隧道工程的地质条件、周边环境和工程特点,对该隧道的施工难点和可能存在的风险进行分析,发现主要存在地层复杂、覆土厚度变化大、穿越黄浦江和已运营隧道等难点。
补充资料：难点
1.问题难以解决之处。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条