World’s Top Construction, Mining Equipment Makers Flash Warnings

A worker labors on a Komatsu Ltd. excavator in a repair shop for large machinery at a copper-gold mine. 

Photographer: Taylor Weidman/Bloomberg

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Komatsu Ltd. added to a lackluster reporting period for the world’s top construction and mining equipment makers, posting a 22% drop in first-quarter profit on waning demand in China and Indonesia.