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caocao4735(½ð±Ò+1):thank you for the answer 2010-12-03 21:07:09
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Originally posted by changgong52 at 2010-12-03 00:21:19:
´¿½ðÊôÔÚA,BÁ½ÖÖÌõ¼þϽᾧ£¬ÔÚAÌõ¼þϱÈBÌõ¼þϾ§Á£Ã÷ÏÔ¸üС¡£½âÊÍ¿ÉÄܲúÉúµÄÔ­Òò¡£

Supposing the pouring temperature is the same, there are three possibilities:

(1) A has higher cooling rate than B (by different mold, water cooling or something else);
(2) A uses better and/or more master alloy than B;
(3) A uses more effective vibration technology (mechanical, ultrasonic, electrical magnetic or something else) than B.
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