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1·Butt contact and angular contact welding seam corrosion detection sensors were designed respectively.

分别设计了适合对接和角接焊缝腐蚀检测的两种传感器。

2·Butt we, who live indoors, have lost contact with the moon.

但生活在室内的我们，已经失去了和月亮的联系。

3·End face with a gap, no boss butt is refers to the upper and lower casing left a certain gap between the upper and lower main chord rod end face at the same time contact.

端面有间隙、无凸台对接是指在上、下套管之间留有一定间隙，上、下主弦杆端面同时接触对接。

4·End face with a gap, no boss butt is refers to the upper and lower casing left a certain gap between the upper and lower main chord rod end face at the same time contact.

端面有间隙、带凸台对接外形是指在标准节上部主弦杆上焊有定位凸台，定位凸台伸人另一标准节主弦杆内，上、下套管之间留有一定间隙配合定位。