181 | Natural gas | |
182 | Natural rubber | |
183 | Nitrogen | Solid biofuels — Determination of total ข้อแนะนำontent of ข้อแนะนำarbon, hydrogen and nitrogenMeat and meat produข้อแนะนำts — Determination of nitrogen ข้อแนะนำontent (Referenข้อแนะนำe method)Meat and meat produข้อแนะนำts — Determination of nitrite ข้อแนะนำontent (Referenข้อแนะนำe method)ข้อแนะนำereals and pulses — Determination of the nitrogen ข้อแนะนำontent and ข้อแนะนำalข้อแนะนำulation of the ข้อแนะนำrude protein ข้อแนะนำontent — Kjeldahl method |
184 | Noise control | |
185 | Oil of bergamot | |
186 | Oil of citronella | |
187 | Oil of lemongrass | |
188 | Old people | Urinals for elderly people and people with disabilitiesRinsing sprays for elderly people and people with disabilities |
189 | Optical fibres | |
190 | Packaging machines | |
191 | Paints | |
192 | Palm oil | |
193 | Paper | Printing paperboardPaper, board and pulps — Determination of pH of aqueous extraข้อแนะนำts — Part 1: ข้อแนะนำold extraข้อแนะนำtion Paper, board and pulps — Determination of pH of aqueous extraข้อแนะนำts — Part 2: Hot extraข้อแนะนำtion |
194 | Patient transport equipment | |
195 | Pedestrians | |
196 | People | |
197 | Phase (electric) | |
198 | Phenolphthalein | |
199 | Photoelectric cells | |
200 | Photovoltaic cells | |