tvb now,tvbnow,bttvb h7 R6 {8 K; r" E
tvb now,tvbnow,bttvb' ^0 ~( F$ ]/ R9 ?: U$ z
等政府剷雪車清理過路面就可以出街囉!!
1 n. Q3 E* q; J$ {6 x2 ^5 |- t# wtvb now,tvbnow,bttvb有 D 州市(例如紐約市)會在路面撒鹽或者沙,鹽會融雪同冰,沙可以增加車輪對地面附著摩擦力(Traction)!!http://s9.tinypic.com/296fsw ...
# {: S9 a4 P& k7 Ltvb now,tvbnow,bttvbgracechanstuart 發表於 2016-12-9 05:18 AM  we stopped using salt for years. sodium chloride is more environment friendly. |