这是什么门，重得几乎推不动 老陈是一个年近７０的退休干部，刚刚搬进了一幢新落成住宅楼第十层，楼梯间的防火门正对老陈家门口，不过他不知道那叫防火门。老陈第一次推那门时差点被弹了回来。“这是什么门，重得几乎推不动。”老陈埋怨道。 老陈找到一块木梢塞住防火门脚， This is what the door, weight is almost pushed Fixed old Chen is a retired cadre nearly 70, has just moved into the tenth floor of a newly completed residential buildings, fire doors in the stairwell is opposite the old Chen door, but he Do not know what is called fire door. When Lao Chen pushed the door for the first time, he was almost bounced back. “What is this door, weight almost fixed.” Chen complained. Chen found a wooden tip plug fire door,