1、
2、
A-type granites keep abreast of I-type and S-type granitites, and are animportant genetic type.
与I型和S型花岗岩一样, A型花岗岩也是一种重要的成因类型.
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3、
And it can be used for designing composite I-beam and I-typed crane beam.
这对工程上组合梁及吊车梁的设计具有实际意义.
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