A gate is composed of two color - striped poles that are suspended from an aerial wire that spans the race waterway 水门由两根带彩条的杆构成，杆悬挂在横跨水道上空的缆绳上。
2.
Jbl ， jbt ， jb - tl specific forms parallel groove clamp is suitable for unendure force splicing and branch on the aerial wire , being used with insulation cover . it ' s action is insulation protection Tl系列异型并沟线夹适用于架空电力线路中导线的非承受力接续与分支，与绝缘罩配套使用起防护绝缘作用。
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