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１９７４年联合设计生产的统型产品——外径５１ｍｍ的行星滚锥结构混凝土振动棒，达到了当时的国际先进水平。在这以后将近１／４世纪的时间里，如何提高振动棒性能指标，一直是业内人士关注的问题。新设计的ＺＮ５０ｓ强力型混凝上振动棒，对原结构进行了改进，有效地提高了
1974 joint design and production of integrated products - the outer diameter of 51mm planetary roller cone concrete vibrator, reached the then international advanced level. Nearly a quarter of a century later, how to improve vibration bar performance has always been a concern in the industry. The newly designed ZN50s powerful coagulation on the vibrating rod, the original structure has been improved, effectively improving