Practical work Thursday November 16 2017 by CKN Electrical wiring and pneumatic wiring practice https://www.facebook.com/suon.phearin/videos/1368510213244735/?hc_ref=ARTiPvTMenUAwxk5-FmWKJlXamvBf1FQ9tpOBzTVv5C7HUBYZIjNWDE42JporOLPDbQ
