Machine tools - test conditions for bridge - type milling machines - testing of the accuracy - part 1 : fixed bridge portal - type machines 龙门铣床检验条件精度检验第1部分:固定式龙门铣床
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Machine tools - test conditions for bridge - type milling machines - testing of the accuracy - part 1 : fixed bridge portal - type machines 机床.桥式铣床的试验条件.精确度试验.第1部分:固定桥式