Man-made damage, due to ill-metal valve design, manufacturing is not fine, improper selection, installation is not correct, use the good and poor maintenance caused by such factors.

人为损坏，是由于金属阀门设计不周、制造不精、选材不当、安装不正、使用不好和维修不力等因素引起的。

youdao

The region is much too far from affluent markets, and still too ill-connected, for most manufacturing businesses to think of setting up there.

ECONOMIST: Tibet

The company faces serious competition from Cutler Manufacturing Corp. of Eaton Park, Fla. and Auth-Florence of Glendale Heights, Ill.

FORBES: Indestructible