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我们为了修理配件,要建立一个小型翻砂间,铸件在50公斤以内,请问需要那些设备?我们还需附带铸铜,关于制造坩埚的材料及制造的方法亦请一并答复。丁成写丁成齐同志:
In order to repair the parts, we need to set up a small sand-casting room with the casting within 50kg. Do you need those equipments? We also need the cast bronze. Please also reply about the materials for manufacturing the crucible and the manufacturing method. Ding Cheng wrote Comrade Ding Chengqi: