显影系统是指完成整个显影工作所涉及的部件的总称。显影是指将复印机扫描曝光后已经被曝光感光板所接受的静电影像，转变成可见的墨粉影像的过程称为显影过程。
危险包括低血压，呼吸停止，药物中毒反应，和罕见的神经系统并发症。硬膜外麻醉对产程进展没有明显影响。
Risks include hypotension, respiratory arrest, toxic drug reaction, and rare neurologic complications. An epidural has no significant effect on the progress of labor.
结果：盆腔炎、流产史、放置宫内节育器、盆腔手术史、输卵管结扎术、生殖系统病理改变对异位妊娠的发生有明显影响作用。
Results: Pelvic inflammatory diseases, abortion, IUD, pelvic cavity operation, tubal ligation and pathological changes of reproductive system have evident effect on ectopic pregnancy.
检查所有压力表，溢流水管流量，显影缸加热系统，冷却系统。
Check all the pressure meters, the flow of the overflow tube, the heating system of the developing tank and the cooling system.
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