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- 17:47, 21 November 2007 diff hist +682 Techniques →RoHS/lead-free
- 17:42, 21 November 2007 diff hist -224 Techniques →RoHS/lead-free
- 17:41, 21 November 2007 diff hist +619 Techniques →RoHS/lead-free
- 17:25, 21 November 2007 diff hist +254 Techniques →Solder
- 17:19, 21 November 2007 diff hist -1 m Techniques →Silicone Rubber and other Silicones
- 17:18, 21 November 2007 diff hist +1,483 Techniques →Copper
- 01:02, 21 November 2007 diff hist +1,197 Techniques →= semiconductors: computer constituent materials
- 00:12, 21 November 2007 diff hist +12,746 Techniques →Environmental Issues: partially populated section
- 19:48, 20 November 2007 diff hist +28 Techniques Added Environmental Issues section