單項選擇題低熔烤瓷材料的熔點(diǎn)溫度為()
A.500℃以下
B.500~1000℃
C.11000℃以上
D.1200~1450℃
E.850~1050℃
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1.單項選擇題中熔鑄造合金的熔化溫度為()
A.500℃以下
B.500~1000℃
C.11000℃以上
D.1200~1450℃
E.850~1050℃
2.單項選擇題鑄造鎳鉻合金鑄造后線收縮率為()
A.2%~0.5%
B.43%
C.24%~1.26%
D.8%~2.10%
E.13%~2.24%
3.單項選擇題鑄造鈷鉻合金鑄造后線收縮率為()
A.2%~0.5%
B.43%
C.24%~1.26%
D.8%~2.10%
E.13%~2.24%
4.單項選擇題鑄造金合金鑄造后線收縮率為()
A.2%~0.5%
B.43%
C.24%~1.26%
D.8%~2.10%
E.13%~2.24%
5.單項選擇題自凝塑膠的線收縮率為()
A.2%~0.5%
B.43%
C.24%~1.26%
D.8%~2.10%
E.13%~2.24%