The present invention provides carbapenem hydrochloride trihydrate crystals, which are chemically stable, easily purified and useful as antimicrobial agents, a process for producing them, and a powdery charged preparation for injection containing them. The rotary deflector is installed in a closed space. Hence, the lifetime of the wavelength converting material may be prolonged. Conveniently, the U-shaped portions anchor a concrete topping which is poured over the slabs at a bridge site and also provide locations for hooking a crane used to transport the slab at a site.