A closer inspection of the toolmark shows a series of parallel teeth marks, probably from the use of a plumber's wrench or tongue-and-groove pliers.
放大后的检验，可见一系列平行的齿纹，有可能来自管钳，会其他靠钳齿来抓牢工件并旋转的钳子。
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StumbleUpon is a useful tool that lets you mark websites you like, save information for later and find webpages that other users have marked as interesting.
One of Mark Poster's important presuppositions is language is not transparent tool of action, the other is that subject is constructed in the actions and structures of interchange.