A fence includes a plurality of fence units, which consist of plural vertical rods and plural lateral rods crossingly combined with each other. In some embodiments, the line manager is attached to a bed rail of a hospital, or medical bed and may be used to position and label the various tubes or lines going to the patient. \u2014, \u2014S2\u2014, \u2014C\u2014, \u2014CR3R4\u2014, \u2014P\u2014 and \u2014SiR6R7\u2014; R3 and R4 each represent a hydrogen atom, or an alkyl group having from 1 to 6 carbon atoms; R5 to R7 each represent an alkyl group having from 1 to 6 carbon atoms. The input power factor correction circuit boosts the converted DC power and the operating voltage. The chromatographic method provides an improved measure of argon in oxygen, oxygen in argon and oxygen in hydrogen.