diff --git a/src/App.vue b/src/App.vue
index e11a684..6518085 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -490,7 +490,7 @@ function buildNet(): BuiltNet {
       resistors.push({ inst, nPlus: n0, nMinus: n3, R: Rad })
       // CD 固定为最大电阻
       resistors.push({ inst, nPlus: n2, nMinus: n3, R: Rmax })
-    } else if (key === 'resistor' || key === 'light_bulb' || key === 'meter') {
+    } else if (key === 'resistor' || key === 'light_bulb' || key === 'meter' || key === 'resistance_box') {
       const R = Math.max(1e-6, safeNum(inst.props?.['resistance'], 0))
       resistors.push({ inst, nPlus: n0, nMinus: n1, R })
     } else {