Specifies visual grading rules and dimensional tolerances for timber cross-arms intended for use as supports for overhead utility service cables. Two grades of cross-arms are described and an optional top surface grade is also given. F-grades are given f
AS 3818.4-2003由澳大利亚标准协会 AU-SA 发布于 2003。
AS 3818.4-2003在国际标准分类中归属于: 79.040 木材、原木和锯材。
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