The structure of model ZPG-2 and V bogie concrete injection machine and their properties are studied in the paper. On the basis of this,the improvement design was made and model TP5.5 concrete ejector was produced.是什么意思_The structure of model ZPG-2 and V bogie concrete injection machine and their properties are studied in the paper. On the basis of this,the improvement design was made and model TP5.5 concrete ejector was produced.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句