Hand wheel,lever and spanner driving and safety valve,pressure reducing valve,traps overleap this symbol.

1、手轮、手柄和扳手传动以及安全阀、阀、疏水阀省略本代号。

Always depressurize a regulator before closing the adjusting knob and removing the regulator from the cylinder.

在关闭调整钮和从钢瓶上断开调整器之前，总是使调整器。

Should a valve need repair, depressurize and drain the system on both sides of the valve.

如果一个阀门需要维修，则在阀门两侧对系统进行和排放。

The first helps you control your vertical velocity to limit the risks of ear barotrauma and DCI.

上升/下降绳可以帮助你控制垂直方向速度并以此来降低耳朵气性创伤和病危险。

To describe the clinical applycation of domelike decompression of the lumbar vertebral canal and evaluate the outcomes.

介绍穹顶形开窗术治疗腰椎管临床应用,并进行临床疗效评估及生物力研究。

Conclusion:The main causes of the disease might be of the retrogressive metamorphosis,compens...

保留脊柱后结构髓核摘除、椎管扩大手术效果是满意。

Methods Surgical procedures included removal of cranlai hema toma, contusive and necrotic brain tissues, correction of cranio？orbital defor mity,and repair of dure mater.

方法早期手术治疗包括清除颅内血肿和清除挫伤坏死脑组织，矫正颅眶畸形及视神经管、修补脑脊液漏。

Methods 18 cases of calcanodynia were received comprehensive surgical therapy,including resection of bone spur,lysis of plantar fascia and decompression by drilling in calcaneus.

方法18例患者都接受了骨刺切除、跖腱膜松解、跟骨钻孔手术。

Series 909 Reduced Pressure Zone Assemblies are designed to provide crossconnection control protection of the potable water supply in accordance with national plumbing codes.

系列909区总成具有饮用水供应系统交叉连接管理功能，符合美国国家管道行业有关规定。

When metal-bearing solution moved along deep faults to cavities or frac tures, the metal cations reated with pyrite and organic matter and precipitated as sulfid...

在构造带中，铅锌配合物交代地层中黄铁矿或被有机质还原而沉淀富集。

Aiming at the shortage of visbreaker feedstock and fuel oil as well as the surplus of asphalt in Shanghai Oil Refinery, asphalt blended feedstock was tested.

高桥石化公司炼油厂针对粘裂化装置原料紧缺造成燃料油供应紧张及沥青出厂困难等情况，采取了以渣油掺炼部分沥青作为粘装置原料措施。

Conclusion The anterior operation has a significant effect on OPLL, which could resect the ossific tissue directly, decompress the spinal cord completely, and fix the vertebrae firmly.

结论 OPLL经颈前路手术可直接切除致物，彻底，钛板固定可靠，手术效果良好，但手术风险及合并高于后路手术。

Conclusion Strict aseptic management to surface of wound and continuous gastrointestinal decompression can raise the survival rate of infant with acromphalus, also can improve the remote life quality.

结论严格无菌创面处理和可靠而持久胃肠可提高新生儿脐膨出患儿存活率，远期生活质量良好。

This article makes comparative analysis of the sectorization for the sprinkler system used in high-rise building and approaches to the details for pressure reduction and choice of fire-fighting pumps.

该文对高层建筑自动喷水系统分区进行比较分析,针对措施和消防泵选择一些细节进行了分析和探讨。