The utility model has the advantages of simple structure, convenient use and tight meshing among layers; the utility model can prevent the leakage of the water.
本实用新型结构简单，使用方便，层间咬合紧密，可防止水的渗漏。
Such tight multilayer structure is to protect the fiber to prevent fracture and to prevent the intrusion of sea water.
这样严密多层的结构是为了保护光纤、防止断裂以及防止海水的侵入。
The structure adopts gradual decompression technology and built-in drainage system, which ensures a satisfactory water-tight and air-tight performance.
结构采用逐渐减压原理，内设排水系统，防雨水渗漏和防空气渗透性能良好。
The underground water-tight rocky cave oil storage is an advanced structure specially designed to store various oil products.
地下水封石洞油库是专为储存各种石油产品的一种先进设施。
The underground water-tight rocky cave oil storage is an advanced structure specially designed to store various oil products.
地下水封石洞油库是专为储存各种石油产品的一种先进设施。
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