机械零件 - 2026 进行中

科目: 机械零件
级别: VII
类别: 大学生
测试题目: 英语
问题示例: In a helical gear mesh, the helix angle primarily introduces which additional force component compared with a spur gear mesh? An axial thrust force, A centrifugal force along the shaft, A tensile force in the gear rim, A bending force in the tooth profile