submitting challenge 2

https://drive.google.com/open?id=1RuxkFsrky_5sw7gpAIkQ6B7R67MfTVeu

steps to model oil tank

1)draw a 2d sketch

2)surface extrude

3)fillet

4)surface trim

5)surface knit

6)shell

7)extrude

https://drive.google.com/open?id=1jxm0eYPLeuCtCIQIrDaF4lWg2BnLZELa

steps to model chain

1)draw a 2d sketch

2)extrude

3)mirror

4)fillet

5)curve driven pattern

https://drive.google.com/open?id=1enUEAJtb3a2hC3Jv_zByY_IfPkQVs8rn

steps to model pedal

1)draw a 2d sketch

2)extrude

3)revolve

4)dome

5)linear pattern

6)fillet

7)champer

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