说明:this is a rule for ship fabrication subject to the RINA classification requirement.
I think can help everyone to ship the annual survey for good preparation. <doreme77@123_> 在 2021-05-19 上传
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说明:the welding code is for the underwater subject to American welding society. I hope can help everyone to understand the underwater welding requirement. <doreme77@123_> 在 2021-05-19 上传
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