Welding joints must be certified before implementation of the welding process, thereby, the improvement of the welding process on barrel of pressure vessel is proved.

实施筒体的焊接工艺前，必须验证焊接接头的使用性能，从而证明压力容器筒体焊接工艺的重要性。

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Your certified copy of fax dispatched to the account within forty-eight (48) hours after shipment advising name of vessel, quantity, weight, value and date of shipment.

小时内发送的通知船名、数量、重量、金额和启运日期的通知复印件一份。

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