ISTA 6A 测试关于随机振动和压箱测试

关于FEDEXISTA6A测试有几个问题;
1.随机振动duration描述是30minutesforinternationalshipmentsl，指的是哪几个面的振动呢？是不是三轴向都需要做30min？
1.Programthevibrationsystemtoreproducethree
consecutivesequencesofrandomvibrationprofiles
representingtheFedExdistributionenvironmentas
indicatedinthespectraprofiles.
•Truckvibrationat0.52Grms(profileone).
•Airvibrationat1.06Grms(profiletwo).
•Repeattruckvibrationat0.52Grms
(profileone).
2.Setthedurationofeachsequenceat15minutesfor
U.S.shipments,30minutesforinternationalshipments.

2.关于压箱测试，duration又是怎么决定的呢？看到里面描述是：
不太明白第五步的意思：
描述：
2.Setupthecompressiontesterforthestopforce,
equivalenttothecompressionloadcalculatedin
stepone,theyielddetectionpercentage(15%)and
stopdeflection(1″).
3.Centerthepackagedproductonthelowerplatenofthe
compressiontester.
4.Bringplatenstogetherat0.5″perminute.
5.Concludethetestwhenoneoftheseconditionsisfirst
detectedbythecompressiontester:
•Thestopforce.
•Theyielddetectionpercentage.
•Thestopdeflection.