前项改帐作业应由双方出具书面证明文件为之。
In an account change under the preceding paragraph, both parties shall provide written substantiating documentation.
注册专业工程师必须提交上述事项的书面证明文件，由管架集团(PSG)工程总监对所提交的书面文件进行评审。
Documentary evidence to demonstrate the above will be submitted by the RPE for review by the PSG Engineering Director.
注册专业工程师必须提交上述事项的书面证明文件，由管架集团(PSG)工程总监对所提交的书面文件进行评审。
Documentary evidence to demonstrate the above will be submitted by the RPE for review by the PSG Engineering Director.
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