| 摘要 |
<p>A trough for cultivation of snails is formed with inclined sidewall and base panels to facilitate regular rinsing towards an integral longitudinal drain. Pref. the trough is thermoformed from low density polyethylene sheet, typically about 5 mm thic, complete with an integral vertical rim with a horizontal lip. A one-piece trough may be about 2 m long, 1 m wide, 0.2 m deep. Suitable for use at 20+- 3 deg.C and 85-100% humidity, to maintain snail rearing free from hibernitic constraints or risk of disease or contamination which might inhibit sale for food. Support blocks may be located in recesses beneath the base of the trough. A strip heating element, described in a complementary patent (Fr. App. 80.05069 of 6 March 1980), may be mounted around the inner face of the rim of the trough.</p> |
