在该三根导杆的上端固定连接有所述顶横梁；在该三根导杆的下端则固定连接有所述活塞；
The three guide rods are set parallel mutually between the top cross beam and the lower piston and distributed in an equilateral triangle.
麦克弗森踢了个角球，詹姆斯头球顶出横梁后出界。
McPherson took the corner and James crashed his header off the crossbar and over the line.
此前，迪福还曾接应格伦·约翰逊的传球顶中横梁。
A little earlier, Jermain Defoe had nodded against the bar from a Glen Johnson delivery.
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