清灰机构：采用液压驱动棘轮、棘爪装置或蜗轮蜗杆装置湿式双侧除灰。
Slag collector: wet slag discharge is made by hydraulic ratchet wheel, detent, worm wheel or worm from both sides.
它们是棘轮效应驱动下的产物。美国政客们有很大的自由提出新法律。
They have been driven by a ratchet effect.Individual American politicians have great latitude to propose new laws.
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