求翻译：但在应用过程中发现以双氰胺为固化剂的环氧树脂层压板耐热、耐水性不佳；另外，在敷铜板的铜箔和固化树脂界面上产生茶色斑点，导致使用中故障频繁发生。是什么意思？

But found dicyandiamide as the curing agent of epoxy laminate heat, poor water resistance; In addition, the brown spots on Bonded Copper foil and cured resin interface, resulting in failures occur frequently in use in the application process .

But in the application process in order to double-melamine found in the hardener, and heat-resistant epoxy resin laminate is not water resistant; in addition, copper cooler in the copper foil and curing resin interface on a tea-colored spots, resulting in frequent failures in use.

But in the application process discovered take the dicyandiamide as the firming agent epoxy resin laminated wood heat-resisting, the water resistance is not good; Moreover, in spreads the copper plate on the copper foil and the solidification resin contact surface produces the dark brown spot, cause

Found in the application process to dicyandiamide curing agent of epoxy resin laminates poor heat resistance, water resistance; in addition, with copper foil and cause brown spots on cured resin interface, fault occurs frequently in the lead.

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