S"Series is a kind of double-open floor hinge and is applicable for aluminum door, steel door and toughened glass door."

本产品是一种双向开启的地弹簧，适用于铝型材门，钢门，钢化玻璃门的安装使用。

youdao

Wang Yulan, a 56-year old retiree, moved into her new city-built apartment in a 33-floor Chongqing tower three months ago and immediately found a broken cupboard hinge, leak stains on both sides of her short foyer and badly misaligned window sills.

WSJ: China Pins Hopes on Public Housing