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				@@ -66,9 +66,12 @@ class NitrogenUnderground { 
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				             // if (i == 2) nitrogenMonitorCSS3D.position.set(-0.89, 0.31, 0.08); 
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				             // if (i == 3) nitrogenMonitorCSS3D.position.set(-0.89, 0.31, 0.12); 
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				             this.group.add(nitrogenMonitorCSS3D); 
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				-          } else { 
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				           } 
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				         } 
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				+        // 而如若此项超出了已绑定的注氮机数量,则隐藏或销毁 
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				+        if (this.group && i >= this.nitrogenNum && this.group.getObjectByName('monitorNitrogenText' + i)) { 
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				+          this.group.remove(this.group.getObjectByName('monitorNitrogenText' + i) as THREE.Object3D); 
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				+        } 
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				       } 
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				     } 
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				     if (this.group && !this.group.getObjectByName('downWindMonitor')) { 
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