To confirm the safe angle range of pedicle screws must consider the pedicle screws. The safe angle range in clinic is much less than the range in theory.3.
2．颈椎椎弓根螺钉的安全角度范围的确定需要考虑椎弓根螺钉的因素，实际操作时的安全范围角度要比理论上的安全范围小的多。
参考来源 - Iso·2,447,543篇论文数据，部分数据来源于NoteExpress
The safe Angle of nitrogen alloyed austenitic stainless steel is better than high tempered middle carbon steel of HRC33.7 and HRC30.1 in hardness.
含氮奥氏体不锈钢的安全角优于硬度为HRC33.7和HRC30.1的高温回火中碳钢，前者具有较高的抗弹丸倾斜入射的能力。
Considered from safe Angle, architecture is the first defense line of human safety, the human shelter and also the basic space of mankind survival.
从安全的角度来讲，建筑是人类安全的第一道防线，是人类的庇护所，也是人类赖以生存的基本空间。
“Making sure robots are safe will be critical,” says Colin Angle of iRobot, which has sold over 2m “Roomba” household-vacuuming robots.
“确保机器人对人是安全的，这点至关重要。” 科林·安格强调，他所在的iRobot公司已经售出二百万台家用真空清洁机器人“Roomba”。
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