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对３４２０型气相色谱仪（双填充柱进样器，ＦＩＤ／ＴＣＤ检测器）的进样器、色谱柱和气路系统作了改装。改装后的仪器，可用于气体样品至高沸点样品的分析，一台可以完成多种分析任务，已成功地用于化工生产控制和产品质量监测。
The injector, column, and gas system for the 3420 GC (dual packed column injector, FID / TCD detector) have been modified. The modified instrument can be used for gas samples to high boiling point sample analysis, a can perform a variety of analytical tasks, has been successfully used for chemical production control and product quality monitoring.