中间计量，前缀调整

app/view/stage/modal.ejs

@@ -265,7 +265,7 @@
                 </div>
                 <div class="form-group">
                     <label>中间计量表号前缀</label>
-                    <input type="text" class="form-control form-control-sm" value="<%- ctx.stage.im_pre ? ctx.stage.im_pre : '' %>" id="im-pre" maxlength="10">
+                    <input type="text" class="form-control form-control-sm" value="<%- ctx.stage.im_pre ? ctx.stage.im_pre : '' %>" id="im-pre" maxlength="20">
                 </div>
                 <div class="form-group">
                     <label> </label>