论文部分内容阅读
该方拱杆以高强度玻璃纤维和特种树脂为主要材料,通过高技术手段挤拉而成,是一种有广阔应用前景的棚室栽培配套新材。它具有强度高、
The square arch bar is made of high-strength glass fiber and special resin as the main material and is extruded through high-tech means. It is a kind of new material for greenhouses cultivation with broad application prospects. It has high strength,