Firstly gives a definition of nonstandard accumulation point closure, and then compares it with the standard accumulation point closure, some properties of nonstandard accumulation point closure are discussed.

Experimental Study on Media Optimization of Non-standard and High Fineness Two-stage Grinding Process;

The Genesis and Development of "Non-Standard" Architectural Thoughts in the Digital Era;

This text recommends the solid example to introduce non-standard rectangle screw thread ring gauge and plug gauge with the designing project, designing way of thinking, designing the step and calculation method, there is certain reference value for designing all kinds of screw thread measure gauge.

NOX s Non-standard Architecture;