1. The relationship between WTTPN and its underlying net is discussed, and it is proved that the WTTPN is equivalent to its underlying net about liveness, boundedness(safeness) and reversibility.

2. In this paper, the safeness of data bank system, distributed bata bank and statistical data bank is studied. And the data encryption is also studied.

3. As its safeness and convenience, PCA is widely applied in pain management, including obstetric analgesia.

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4. The electricity and fluid symmetrical railroad switch's safeness , reliableness and practicableness on lathedesign according to practice.

5. Liveness and safeness are important behavioral properties of net systems.

6. The electricity and fluid symmetrical railroad switch's safeness, reliableness and practicableness on transfer lathe by adopting the design according to practice.

7. This lamp is reliable safeness, which is suitable for lighting places of explosive mixture and with corrosive gases under temperature of T1-T5. The material of glass cover uses polycarbonate.

8. Objective To evaluate the efficacy and safeness of TGP in the treatment of ankyolsing spondylitis ( AS ) .

9. Liveness and safeness are important behavioral properties of nets (systems).

10. Shu da toothpaste is well known for its quick usage, outstanding effect and absolute safeness.

11. Objective : [ WT 5 BZ ] To compare the effect and safeness of benazepril and captopril in treatment of renal hypertension.