正垂孔的英文

• direct plumb line hole

• 正    the first month of the lunar ...
• 垂    hang down; droop; let fall
• 孔    hole; opening; aperture
• 正垂面    vertical frontal plane
• 正垂线    horizontal-profile line
• 正垂线法    direct plummet observation
• 正垂直偏斜    positive vertical divergence
• 正垂直上升    direct vertical uplift
• 正锤线法    method of right plummet observation
• 正锤［线］观测    direct plummet observation
• 正船尾风    wind abaft
• 正传动式增压器    positive driven type supercharger
• 正传动鼓风机    positively driven blower