问题描述：
英语翻译
With CO2 shielding ,best toughness was obtained in the uphill welding position and with two passes per layer,if all the test temperature rage is considered.
ANSI/AWS A5.29-98 E91-T5-K2/K2M and E101T5-K3/K3M impact requirements were very comfortably satisfied in all the welding conditions,and the all-weld-metal chemical composition met the E101T5-K3/K3M requirement.
With CO2 shielding ,best toughness was obtained in the uphill welding position and with two passes per layer,if all the test temperature rage is considered.
ANSI/AWS A5.29-98 E91-T5-K2/K2M and E101T5-K3/K3M impact requirements were very comfortably satisfied in all the welding conditions,and the all-weld-metal chemical composition met the E101T5-K3/K3M requirement.
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