The utility model discloses a profile, which is characterized in that the profile is composed of three edges with lambdoidal cross section.
本实用新型公开了一种型材，其特征是由断面为人字形状的三个边组成。
The utility model discloses a profile, which is characterized in that the profile is composed of three edges with lambdoidal cross section.
本实用新型公开了一种型材，其特征是由断面为人字形状的三个边组成。
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