Hi Nicholas, That's depend what type of clearance u refer? It can be refer to EN standard. ciao... Adeline Ko > -----Original Message----- > From: Nicholas LAI [SMTP:[log in to unmask]] > Sent: Wednesday, August 25, 1999 11:04 AM > To: [log in to unmask] > Subject: [TN] What is clearance > > Hello all > > There is some item need help .. > > I have inner layer clearance..... What is clearance means...? > What it related to.......?What is clearance function? > Can anyone put some example to me.... on the usage of clearance? > > Best Regard, > Nicholas Lai > 8/25/99 ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################