Upward Rectum vein and lack of venous flap, branching, easy to YuJi blood backflow.
直肠静脉及其分枝缺乏静脉瓣，血液不易回流，容易瘀积。
At this point reverse flow may allow process products to backflow into the cylinder.
在这一点倒流会允许过程中的产品回流进钢瓶。
Contact the factory for specific approvals on the reduced pressure backflow preventer.
如果需要特殊的减压防回流阀的认证，请与工厂联系。
The enclosure and the backflow preventer shall be covered by a single warranty policy.
这种外壳和防回流阀应该应用相同得质量保证政策。
Backflow preventer manufactured from 298 Series stainless steel for corrosion resistance.
防回流阀采用耐腐蚀得300系列不锈钢制造。
Backflow preventer manufactured from 300 Series stainless steel for corrosion resistance.
防回流阀采用耐腐蚀的300系列不锈钢制造。
Causative analysis of successful venipuncture without backflow bl ood and its countermeasures
静脉穿刺成功后无回血原因分析与对策
Dusts backflow continues to contaminate Beijings air， according to an environmental expert.
据一位环境专家称，沙尘回流继续污染北京空气。
Strength verification and safety analysis of the shell of the top backflow gas heat exchanger
顶回流瓦斯换热器壳体的强度校核与安全分析
NOTE DO NOT USE A PIPE WRENCH TO REMOVE THE RELIEF VALVE ASSEMBLY FROM THE BACKFLOW PREVENTER.
注意不要使用管钳从防回流阀上拆卸安全阀总成。
Performance requirements for backflow protection devices and systems in plumbing fixture fittings
卫生设备配件中防逆流装置和系统的性能要求
The shutoff valve with the test cock is to be mounted on the inlet side of the backflow preventer.
带测试旋塞的关闭阀应该安装在防回流阀的进口侧。
Closing of the valve during ventricular contraction prevents the backflow of blood into the atrium.
截止阀在心室收缩, 防止血液回流到心房。
Preliminary research of the influence of distorted model scale on backflow similarity of reentrant harbor basin
变率对凹入式港池回流相似性影响初步研究
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