boiler paralleling

例句：

1. 1.The new boiler was installed in the factory's main building, parallel to the existing one.
   新锅炉在工厂主楼与现有锅炉平行安装。
2. 2. The engineers decided to install a new boiler parallel to the old one for efficiency reasons.
   工程师决定为了提高效率的原因，将新的锅炉平行安装在旧的锅炉旁边。
3. 3. The new boiler is being paralleled with the old one for testing purposes.
   新的锅炉正在与旧的锅炉平行安装，以便进行测试。