aluminum scaffolding assemble standard
High homework (1) Wearing tight clothes, shoes, prevent slippery mouth to wear a helmet, wearing a seat belt. (2) Stopping high homework when meet the fog, heavy rain and strong winds. (3)Bring all the homework, temporarily need not tools, load hat. (4) Various materials with rope or walking is put in the ground of method, and shall not be thrown down materials. (5) homework personnel shall not mutual play under zone, so as not to slip crashed accident. (6) Without allowing anybody not to change or [...]