Martin teach you, how to identify the oil seal.
1. Appearance Of Items.
2. Burning the item, then see and smell.   

 

 

 

 

Martin Xie

SKYPE:tonyie75
MOB:+86 13102576010
TEL/FAX:0086-0319-3128009
E-mail:martin2015(a)foxmail.com

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