油服工程板块12月18日涨0.92%，准油股份领涨，主力资金净流入6668.78万元

Group 1 - The oil service engineering sector increased by 0.92% compared to the previous trading day, with Junyou Co., Ltd. leading the gains [1] - On the same day, the Shanghai Composite Index closed at 3876.37, up 0.16%, while the Shenzhen Component Index closed at 13053.98, down 1.29% [1] - A detailed table of the individual stock performance within the oil service engineering sector is provided [1] Group 2 - The net inflow of main funds into the oil service engineering sector was 66.688 million yuan, while retail funds experienced a net outflow of 64.7103 million yuan [2] - The net outflow of speculative funds was 1.9775 million yuan [2] - A detailed table of fund flows for individual stocks in the oil service engineering sector is included [2]