Oil cup in Pensky-marten‚Äö√Ñ√∂‚àö√ë‚àö¬•s apparatus is made with __________$

Oil cup in Pensky-marten‚Äö√Ñ√∂‚àö√ë‚àö¬•s ap

1.	Oil cup in Pensky-marten‚Äö√Ñ√∂‚àö√ë‚àö¬•s apparatus is made with __________$
A.	Brass
B.	Iron
C.	Copper
D.	Steel
Answer» B. Iron