There have been bumps along the way, of course. Last February, Zvonareva reached a career-high No. 5, but an ankle injury tripped her up, causing her to miss the French Open and struggle for at least half the year. At the start of the year it wasn’t clear if she’d get that mo...
Excessive bumps not only affect the automatic pole-casting device to take polesbut also cause the planting mechanism to take poles, impacting the success rate; therefore, the field needs to be flattened before operation. The small-arch greenhouse automatic planting, insertion and mulching machine ...