论文部分内容阅读
在管道施工过程中,经常要变换不同规格的管径。为了提高工效、减轻劳动强度,我们改制成一种新型快速管钳,如图所示。
In the pipeline construction process, often change the diameter of different specifications. In order to improve work efficiency, reduce labor intensity, we converted into a new type of quick pipe wrench, as shown.