单项选择题
A.≤3mm;≤2mm;≤3mm;≤0.5mm B.≤3mm;≤3mm;≤2mm;≤0.5mm C.≤3mm;≤3mm;≤3mm;≤1mm D.≤3mm;≤2mm;≤3mm;≤1mm
A.≤5mm;≤5mm;≤4mm;≤15mm B.≤4mm;≤4mm;≤4mm;≤10mm C.≤4mm;≤4mm;≤4mm;≤15mm D.≤4mm;≤5mm;≤4mm;≤12mm
A.原材、加工、焊接、尺寸 B.原材、加工、连接、安装 C.原材、加工、焊接、安装 D.原材、加工、焊接、外观