Thermo Scientific™ 13mm 自动进样器样品瓶隔垫
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PTFE disk septa are chemically inertPFTE/red rubber septa are economical for many GC applicationsPTFE/silicone septa are
PTFE disk septa are chemically inertPFTE/red rubber septa are economical for many GC applicationsPTFE/silicone septa are