Work out their content by unit absorptivity.

再利用单位吸光系数换算其含量。

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Under the room temperature, PTMEG has the water absorptivity.

在室温下，PTMEG都具有吸水性。

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So it is necessary to determine the laser absorptivity of ductile iron.

因此，确定球墨铸铁材料对激光的吸收率十分必要。

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So it is necessary to determine the laser absorptivity of ductile iron.

因此，确定球墨铸铁材料对激光的吸收率十分必要。

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