Steel welding procedure qualification under the pressure of JB / T 4708-2000 determine the product of welding procedure qualification program, to complete the project welding procedure specification.

根据钢制压力焊接工艺评定JB/T 4708-2000确定产品的焊接工艺评定项目，完成焊接工艺评定项目说明书。

youdao

dT That means that dH is also equal to dH/dT, constant pressure dT. All right, so now I've T ot more dH/dT under constant pressure.

也等于偏H偏T恒压乘以，现在我已经得到了在恒压,状态下的偏H偏。

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