安全设施,安全措施;
The contamination of hydraulic system and it's prevention maintenance
液压系统的污染与主动预防性维护
This paper analyzes causes of four familiar cracks of asphaltum concrete pavement, and brings forward relevant prevention and maintenance method.
系统地对沥青混凝土路面四种常见裂缝产生的原因进行了分析,同时也提出了相应的预防与治理措施。
Objective To study the method for Peripherally inserted central catheters ( PICC ) maintenance and prevention of complication.
目的探讨 PICC 导管的维护方法及并发症的预防.
The investigation by questionaire showed about 58% of the epidemic prevention stations had no maintenance worker.
问卷调查显示,58%的卫生防疫站无维修人员。
The cornerstone of health maintenance and disease prevention is an annual medical examination by your physician.
年度体检是健康维护和疾病防治的基础.
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