求翻译：（六）严格按照燃气使用范围用气，未经供气方书面许可，不得添装、改装燃气管道，不得更改变动、损害供气方的供气设施，不得擅自更换、变动燃气计量表，否则视为盗用燃气，按本合同第七条第（二）3项之规定处理。是什么意思？

(F ) strictly in accordance with the gas range gas without the gas supplier written permission Tim installed , modified gas pipeline , should not be changed to change the supply side of the supply facilities damage will be allowed to replace , change the gas meter , or

(6) strictly in accordance with gas usage of the air, without a gas supply written license, shall not be added and modified the gas pipeline, and may not be changed, in view of the changes in damages for the air supply to the gas supply facilities, and do not change, change Gas Gauge, otherwise, it

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(Vi) in strict accordance with the gas range with gas, without the prior written consent of gas supply, gas pipeline may not be added, modified, change, damage, gas supply facilities should not be changed, without replacement, change of gas meter, or as stealing gas, according to the seventh article

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