<p class="MsoNormal" style="margin: 0cm 0cm 0pt; text-indent: 21pt"><font size="3"><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">基于</span><span lang="EN-US"><font face="Times New Roman">PLC</font></span><span style="font-family: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">温室环境智能控制系统的设计</span></font>