| http://www.w3.org/ns/prov#value | - In FIG. 2, a sow is shown eating feed from the trough 7 which it has previously released from the hopper 6 by self-actuating a feed release mechanismindicated generally at 8.The body of the feeder 5 is formed of a suitable sheet material such as stainless steel or the body may be molded in one or several parts from a suitable plastic which has suitable physical properties such as environmentally s
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