Need help

1) 轴承Shaft (SM45C)  What does (SM45C) stand for ?

2) electric motor  50HZ*TE*IP56*VVVF What does "TE", "IP56", "VVVF" stand for?


3) Atomizing air unit ( air filter, regulator, SOL V/V, limits S/W, PG)  What does "SOL V/V", "limits S/W", "PG" stand for?

Thanks in advance for everybody's great help,

1.SM45C是优质碳素结构钢４５＃
2.TE不清楚是否指的是增安型电机，呵呵，可以请教下电气专业的。
IPXX指的是防护等级，第一个数字指的是防止固体进入内部的等级，第二个数字指的是防止水进入内部的等级。从防护等级IP56来看，猜测该电机为户外型，用于海水泵的电机？
VVVF，是Variable Voltage and Variable Frequency的缩写，变频调速系统，亦即该电机为变频调速电机。

Perfect and professional answer   Thanks for your great help.

TE 是否是totally enclosed 即全封闭型？

SOL V/V：solution V/V 即体积溶解比
limits S/W: Steam/Water 蒸汽/水的限值
PG：pressure guage 表压

Just learned something new, Many thanks!