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中华人民共和国劳动和劳动安全行业标准《逆反射型矿山安全标志技术条件和试验方法》ＬＤ８８─１９９６ＳｐｅｃｉｆｉｃａｔｉｏｎｓａｎｄＴｅｓｔｉｎｇＭｅｔｈｏｄｓｏｆＲｅｔｒｏｒｅｆｌｅｃｔｉｖｅＳａｆｅｔｙＳｉｇｎｓｆｏｒＭｉｎｅｓ１９９６─０５─２７...
People’s Republic of China labor and labor safety industry standard “Re-reflective mine safety signs technical conditions and test methods” LD88─1996SpecificationsandTestingMethodsofRetroreflectiveSafetySignForMines19──────────────────────────────────────────────────────────────────────────────────────────────