求翻译：用预糊化淀粉作粘结剂制作的砂芯不仅清砂容易，而且具有表面光洁等特点。世界已广泛采用此技术，汤加王国也开始应用。是什么意思？

Produced using pre-gelatinized starch as binder of sand core is not only easy to sand and smooth surface characteristics. The world has been widely adopted this technology, the Kingdom of Tonga began to apply.

With a pre-made paste and starch adhesive is produced not only clear the sand-sand easily, but also of a surface. World has been widely used in this technology, the Kingdom of Tonga has also begun applications.

Makes the cementing agent manufacture not only with the pregelatinization starch the granulated substance core the clear granulated substance to be easy, moreover has the surface brightly and cleanly and so on the characteristics.The world has widely used this technology, the Kingdom of Tonga also s

Of pre-gelatinized starch adhesive production not only cleaning of sand cores easily, and have a smooth surface and so on. This technology has been widely used in the world, also began in the Kingdom of Tonga.

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