Because TIG welded joints without filler wire always hold low strength and poor formation, tungsten inert gas welding process with filler wire is inevitable.

由于镁合金不填丝的TIG焊接接头强度低，焊缝表面成型不好，所以，镁合金的填丝tig焊接方法不可避免。

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Expansion joints of various kinds are fitted on gas mains.

各种各样的伸缩接头被安装在煤气的总管道上了。

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To ensure a secure connection, many types of threaded joints are made up to specific torque requirements in oil- and gas-well applications.

在油气井作业中为了确保牢固地连接，许多种类的螺纹接头都被上紧至特定的转矩要求。

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As you may expect, the gas lines that run to the balloons inflate and deflate the joints, causing the fingers to grasp and release as needed.

ENGADGET: Researchers craft microscale robotic hand for surgeries

The hand, which is said to be a "feat of microscale mechanical systems (MEMS), " measures just one millimeter across when closed into a fist, features four "fingers" made of six silicon wafers each, and touts four gas-powered balloons acting as the muscles at the wafers' joints.

ENGADGET: Researchers craft microscale robotic hand for surgeries