由于贵单位调试人员操作失误导致A28L 逆变器损坏，在设备维修过程中，

Because your organization commissioning personnel operational errors led to A28L inverter damage, equipment maintenance process, your organization entrusted by my unit to mobilize personnel and equipment to work with the replacement of your organization, A28 inverter repairs totaling occur: US $ 9,919, the costs to be deducted from the contract sum in your organization.

Due to the operation error of your unit debugging personnel caused damage to the A28L inverter, in the process of equipment maintenance, entrusted by your unit to mobilize personnel equipment to cooperate with the replacement work of your unit, a total of A28 inverter repair costs occurred: $9,919, the cost of which needs to be deducted from your unit contract. ...

The A28L inverter is damaged due to the operation error of your debugging personnel. During the equipment maintenance, our company is entrusted by your company to transfer personnel and equipment to cooperate with your company's replacement work. The total A28 inverter repair cost: 9919 USD, which needs to be deducted from your company's contract money.<br>