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boron carbide abrasive
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boron carbide abrasive
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boron carbide abrasive
碳化硼磨料
在电炉或三相电弧炉中用碳素材料还原硼酸而制成的具有黑色金属光泽的普通磨料。
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purely imaginary expression
purely imaginary number
purely imaginary quaternion
purely imaginary time
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purely inseparable mapping
purely inseparable morphism
purely nondeterministic process
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purely periodic decimal
purely quadratic function
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purely scattering atmosphere
purely transcendental extension
purely unrectifiable set
pure magnesium
pure mathematics
pure metal resistance pastes
pure morphism
pure moxa stick
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