goole webmaster lose external link

any body can help me , what happen of google webmaster
near this days , all my webmatser external link list had lose
i don't know waht's happen
its google big trouble, or my fault,
i had try to find waht's happen ,
but all the action was fail
Please help me
Thank
From Taiwan
Nem Chen

Greatchance tire machine maker

Tire machin manufacture
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pressure cooker

Steam pressure cooker
for high pressure 4 Bar
high temperature 150 deg
working volume 10 CUM