主要提出以下观点：锅炉吊杆用螺母的高度与螺纹公称直径之比不宜小于1。
Presents the following viewpoints:the radio between the height of the nut for boiler hanger rod and the diameter of screw shall not be less than 1.
主要提出以下观点：锅炉吊杆用螺母的高度与螺纹公称直径之比不宜小于1。
Presents the following viewpoints:the radio between the height of the nut for boiler hanger rod and the diameter of screw shall not be less than 1.
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