华为交换机特价处理中： S5700-52C-PWR-SI ESODG48CEAT0 ES02VSTSA QSFP-40G-CU3M S5700-28C-EI-24S-AC S5700-52P-PWR-LI-AC S3700-52P-EI-24S-AC W2PSA0800（黑色） S6720-54C-EI-48S-AC S6720-30C-EI-24S-AC S5720-36C-EI-AC S5720-36C-EI-28S-AC S5720-56C-EI-AC S5700-48TP-PWR-SI-AC S5700-24TP-PWR-SI-AC S5700-28P-LI-AC S5700-52P-LI-AC