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山东省引黄济青指挥部曾从美国GOMACO(勾马克)公司引进一套C-450型大型渠道衬砌机(见图1),用于山东省引黄济青工程输水渠道工程衬砌施工。
Shandong Province Yellow Emperor Jinan Youth Command from the United States GOMACO (hook mark) company to introduce a C-450 large-scale channel lining machine (see Figure 1), for the Yellow River diversion project in Shandong Province lining construction.