﹣ There're only 15types of cranes in the world now. We need to protect these rare birds. ﹣　　. Bir...

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下列合金中含碳量最少的钢是

GCr15 Cr12MoV 1Cr13 1Cr18Ni9Ti

适用于制造渗碳件的材料是

20Cr 40Cr 60Si2Mn GCr15

计算题冶炼1Cr13砌水量15t炉前分析Cr5%成品成份控制到13%Fe-Cr成份68%Cr回收率9

IninternationalaircargotransportationSpecialCommod

属于不锈钢的是

20Cr 9 Si Cr GCr15 3Cr13

适合制造渗碳零件的钢有

16Mn、15、20Cr、1Cr13、12Cr2Ni4A 45、40Cr、65Mn、T12 15、20Cr、18Cr2Ni4WA、20CrMnTi

适用于制造弹簧的材料是

20Cr 40Cr 60Si2Mn GCr15

下列钢中属于奥氏体不锈钢的是

0Cr13 1Cr13 0Cr19Ni9 15MnVR

GCr15钢中Cr的平均含量为15%

下列材料中不宜淬火的是

GCr15 W18Cr4V 40Cr YT15

国际焊接学会推荐的碳当量计算公式为

CE＝C＋Mn/6＋(Ni＋Cu)/15＋(Cr＋Mo＋V)/5 CE＝C＋Mn/15＋(Ni＋Cu)/6＋(Cr＋Mo＋O)/5 CE＝C＋Mn/5＋(Ni＋Cu)/6＋(Cr＋Mo＋V)/15 CE＝C＋Mn/15＋(Ni＋Cu)/5＋(Cr＋Mo＋V)/6

IninternationalaircargotransportationSpecificCommo

WhichofthefollowingstatementsaboutORACLEisarecorre

Ⅰonly Ⅱ only Ⅰ and Ⅱ none of　the above

____Tom______hisfriendknowabouttypesofpersonality.

Either ,or Not only, but also Both, and Neither, nor

下列材料中是典型的锅炉用钢

3Cr18Mn12 1Cr11Mo 15MnVR 7Cr17

600～700℃高温容器用钢一般是

15CrMo 0Cr13Ni9 12Cr2Mo1 1Cr18Ni9Ti

国际焊接学会推荐的碳当量计算公式为

CE=C+Mn/6+（Ni+Cu）/15+（Cr+Mo+V）/5 CE=C+Mn/15+（Ni+Cu）/6+（Cr+Mo+O）/5 CE=C+Mn/5+（Ni+Cu）/6+（Cr+Mo+V）/15 CE=C+Mn/15+（Ni+Cu）/5+（Cr+Mo+V）/6

下列合金中含碳量最少的钢是

GCr15 Cr12MoV 1Cr13 1Cr18Ni9Ti

_______therearemanydifferenttypesoffoodsomeanimals

Since Unless Once While

滚动轴承钢GCr15中的数字15表示Cr的含量是15%

﹣ There're only 15types of cranes in the world now. We need to protect these rare birds. ﹣　　. Bir...

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﹣ There're only 15types of cranes in the world now. We need to protect these rare birds. ﹣ . Bir...

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﹣ There're only 15types of cranes in the world now. We need to protect these rare birds. ﹣　　. Bir...