对船厂来说，冷却水侧不需要泵、水管、滤器、阀和电控设备等，安装制造费用低；
For ship yard, cooling side no water pumps, ductwork, inlet filters, vlves, electrical equipment and savings are need, less installation cost, Fot the owner, less maintenance.
单侧进水的汽包配水管布置简单，并减少了汽包上的开孔数量，配水管上采用变节距分配孔以保证汽包长度方向上的均匀分流。
One-side arrangement for feed water pipe on drum is simple and the quantity of orifices on drum decreases, it adopts variable pitches in multi-orifices distributing pipe to balance water flow.
方法：对18例经高分辨率CT证实为双侧大前庭导水管综合征患者的诊疗过程进行回顾性分析。
Methods: The clinical process of diagnosis and treatment of 18 patients with LVAS confirmed by high resolution ct were retrospectively analyzed.
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