This seal is normally made by holding the torch flame stationary, blowing out a hole in the main glass body to match a second tube (hose connection in this example).
这种密封通常由控股火炬火焰平稳,吹制出一个洞,在主体玻璃机构,以配合第二管(软管连接在这个例子中) 。
This seal is normally made by holding the torch flame stationary, blowing out a hole in the main glass body to match a second tube (hose connection in this example).
这种密封通常由控股火炬火焰平稳,吹制出一个洞,在主体玻璃机构,以配合第二管(软管连接在这个例子中) 。
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