Revision history !Metal bowl, Metal bowl with level gauge, With bowl guard added. !Made to Order (Long bowl, With element service indicator) added. !Number of pages increased from 76 to 80. RU !Nylon bowl added. !The construction drawings of the AW replaced. RZ !Body size 10 added. (AR, AW, AF, AL, AC) !Body size 50, 60 added. (AF, AL) !Spacer changed. !Number of pages increased from 80 to 88. SW Edition B Edition C Edition D