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- 16:47, 21 November 2007 diff hist +682 Techniques →RoHS/lead-free
- 16:42, 21 November 2007 diff hist -224 Techniques →RoHS/lead-free
- 16:41, 21 November 2007 diff hist +619 Techniques →RoHS/lead-free
- 16:25, 21 November 2007 diff hist +254 Techniques →Solder
- 16:19, 21 November 2007 diff hist -1 m Techniques →Silicone Rubber and other Silicones
- 16:18, 21 November 2007 diff hist +1,483 Techniques →Copper
- 00:02, 21 November 2007 diff hist +1,197 Techniques →= semiconductors: computer constituent materials
- 23:12, 20 November 2007 diff hist +12,746 Techniques →Environmental Issues: partially populated section
- 18:48, 20 November 2007 diff hist +28 Techniques Added Environmental Issues section
