方圆集团的16至20吨双钢轮压路机具体信息需要详细了解该集团的产品线以及压路机的具体型号才能准确提供。【例句】Sorry, I am not able to provide specific information about the 16 to 20-ton double steel wheel road roller from Fangyuan Group without detailed knowledge of their product line and the specific model of the road roller.
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