Zoo zoo tom qab-muag

Peb muab cov kev pabcuam kev pabcuam zoo tshaj plaws thiab cov khoom seem rau txhua hom zirconia pretes thiab oxygen analalzers thoob ntiaj teb.

Peb muaj kev saib xyuas txuj ci thiab tom qab muag muag chaw hauv Shanghai.