| 摘要 |
<p>The pressure-resistant core for casting consists of a mixture of mainly water-soluble salts and a binder. It also has a protein combination with inorganic components added to the mixture. The mixture may contain 0.5-5 wt.% of this protein combination, preferably 2% of it. The protein combination with the inorganic components may be in the form of a gelatine.</p> |
