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指出了液面加压控制系统在低压、差压铸造的生产过程中对提高铸件内在质量的重要作用，以及它之所以被忽视的根源及其在工程中面临的困难和解决的途径。
It points out the important function of the liquid level pressure control system in improving the internal quality of the castings in the production process of low pressure and differential pressure casting as well as the reason why it is neglected and the difficulties and solutions in the project.