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各位同学，0 S! _8 F3 {# S
64.4.2 Each product is to be operated at room temperature for 3-1/2 hours. The product is then to be! U) T+ C! k; W$ E1 p3 _* r) y
de-energized and immediately submerged in at least 304.8 mm (1 foot) of water. The temperature of the
) ^8 y" l) q2 K6 @" }) i& iwater before submersion is to be 5°C (41°F) or less. The product is to remain submerged for 4 hours. At3 C3 o# Q) p% Q! ?7 p( P" W
the end of four hours, the product is to be removed from the water and subjected to 2 additional cycles
/ |: }# f, V; I! k! b+ j, Yof operation and immersion. Between each cycle, the product is to be placed in a dry location at room
/ V" d2 a/ v9 I! B4 x7 qtemperature for approximately 16-1/2 hours. The product is to be inspected immediately after the third6 E5 F! o; j! [% h4 T5 M' r
immersion for evidence of water entry.$ X6 _; Z7 J* L# L/ S+ X& ^7 Y2 S
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3-1/2 hours.是指2.5小时还是3.5小时呢？0 j" M, p* f+ n2 I0 d9 f
9 n( s& u4 A D* e7 _谢谢！
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