The research result shows that the basic conditions for tidal bore formation are the funnel-shaped Hangzhou Bay and sand bar rising.
研究结果表明，形成涌潮的基本条件是杭州湾平面喇叭口形态使潮差增大和沿程沙坎的抬升。
2
The basic design self-aligning ball bearing is available with a cylindrical bore or, in certain size ranges, with a tapered bore (taper 1:12).
自调心球轴承的基本设计带有一圆柱孔，或者在某些尺寸范围内带一圆锥孔（圆锥1：12）。
3
Based on the basic features of dynamic gas emission during boring process, a theoretical model for calculating the dynamic volume of gas emission from bore hole is set up.