全国第四次树脂砂技术研讨会为总结树脂砂生产：经验、吸取教训，互相交流、共同提高，全国铸造机械专业委员会和山东省铸造专业委员会联合召开第四次树脂砂专题技术研讨会。本着解决实际问题、进一步降低生产成本、提高经济效益的目的，衷心希望国内采用树脂砂工艺和欲上... The Fourth Resin Sand Technology Symposium In order to summarize the resin sand production experience, learn from each other, and enhance together, the National Foundry Machinery Committee and the Foundry Committee of Shandong Province jointly convened the fourth resin sand seminar. In the solution to practical problems, to further reduce production costs and improve economic efficiency, I sincerely hope that the domestic resin sand technology and desire to ...