Jacket shall have a full length hinged access door with key lock.
外壳应该配置全长铰链监测门,并附带钥匙.
Full-length hinged door with key lock-quality requires full-length hinged doors for ease of inspection and maintenance.
高度足够的铰链门,配置锁及钥匙 --- 符合高质量标准、具有足够高度的铰链门,有利于观察监测和维护.
Through comparative study of hingeless arch bridge 、 two-hinged arch bridge and three-hinged arch bridge, the influence of connection condition of arch on mechanical condition is discussed.
通过无铰拱、双铰拱、三铰拱的体系对比分析,讨论分析了拱自身连接条件对结构受力形态的影响;
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