The X Lounger is based on a single ray, traced along a periodic doublecurvedsurface.
X懒人沙发是基于单线条，沿着曲面双层折叠而成的。
2
The present paper has described the die made by chromium car - bide for forming mass spectrometer needle and doublecurvedsurface glass tube in surface analyzing instrument.
介绍了采用碳化铬硬质合金制作质谱计和表面分析仪器中的双曲面玻璃管的成形模具。
3
This article describes not only theoretical basis for achieving Product 's technical requirements by internal grinding processing doublecurvedsurface, but also improvement of equipment.