When radiographing the curved components whose convex side is toward the source and viewing single wall, location markers shall be used.
曲面工件，凸面对着射线源作单壁透照时，定位标记应在。
When radiographing the curved components whose convex side is toward the source and viewing single wall, location markers shall be used.
曲面工件，凸面对着射线源作单壁透照时，定位标记应在。
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