To train a rat, the experimenter placed it in an operant conditioning chamber: a small plastic box with a lever at one end.
为了训练小鼠，实验人员把它放在一个操作性条件反射室：一个一端置有操作杆的塑料箱。
The optimum programme can be used to design four-connecting lever pneumatic roof-window mechanism of all kinds of multi-span plastic greenhouses by changing load and structure parameters.
通过改变载荷参数和结构参数，优化模型可用于其它塑料温室的气动四连杆天窗机构的设计。
The man upstairs with plastic barrels of mud, fallen after the empty bucket hook back cable hook, the child will control cable lever slowly back.
楼上的人接下胶桶的泥沙，倒下后将空胶桶钩回钢缆的钩子上，小孩又将控制钢缆的杠杆慢慢放回原处。
The utility model relates to a plastic casing type circuit breaker. An operating mechanism comprises a handle, a lever, and a connecting rod.
一种塑料外壳式断路器，其操作机构包括手柄、杠杆及连杆。
The utility model uses lever principle, when a drinker inclines a cup, the iron rod in the plastic jacket shell rolls to open the plastic cover sheet, and the drinker can drink water.
它利用杠杆原理，当喝水者倾斜杯子的瞬间，塑料套壳内的铁棒滚动时打开塑料盖片，喝水者即可喝水。
Clear daily plastic color brick mold, the use of air compressor, soft tool clear concrete residue, tapping, it is forbidden to gravity lever scratch tickets color tile brick mold.
日常清理塑料彩砖模具，使用空压机、软性工具清楚混凝土残渣，严禁重力敲打、撬刮彩砖彩瓦模具。
Clear daily plastic color brick mold, the use of air compressor, soft tool clear concrete residue, tapping, it is forbidden to gravity lever scratch tickets color tile brick mold.
日常清理塑料彩砖模具，使用空压机、软性工具清楚混凝土残渣，严禁重力敲打、撬刮彩砖彩瓦模具。
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