tipping tailer meaning in English

自卸挂车

With an upright black crest , red vent and white tipped tail , measures , about 20 cm
头顶有一竖起的黑冠，拥有红色肛门及白色尖尾，身长约20厘米。
( 5 ) new type difference tail - gates and their combinations are developed , which can decrease tail water level oscillation in tipping tail - gate controlling system . mathematic models are also obtained for the mentioned controlling systems , stability of which is analyzed
( 5 )研制出新型差动尾门及不同的组合型式，克服了翻板门尾水大幅度振荡问题，给出了差动式和翻板式尾水控制系统数学模型，并对它们的稳定性进行了理论分析。