【正文】 products etc. phenomena. To make sure the products can arrive at the destination safely, rapidly and in one piece and deliver to the customers in time. 應(yīng)根據(jù)包裝物品的性質(zhì)、重量、外形尺寸、流通環(huán)境條件和用戶要求，選擇正確的包裝方式，做到包裝緊湊、防護合理、安全可靠。隨機文件應(yīng)齊全。Boundary dimension and weight of packing case should be accorded with domestic and international transport regulations on overrun, overweight. 包裝環(huán)境應(yīng)清潔、干燥、無有害物質(zhì)。In order to reduce costs, ones with the original packaging should try to use the original packaging. Packing cases after the repair or modification shall accord with the relevant standards of professional packaging requirements. 裝箱后等待運輸?shù)陌b箱特別是附件箱要求室內(nèi)存放，確保包裝質(zhì)量不受影響。Main packing ways chose for products and assemblies are nude packing, partial packing and wooden case packing. 防護包裝主要分為防水包裝和防震包裝。Waterproof material adopts polyethylene plastic film and polyethylene plastic posite paper, such as waterproof cloth, PE bag and waterproof tarpaulins etc. and their material and performance accord with the GB/T 7350 standard.防震材料采用聚苯乙烯泡沫塑料、復(fù)合發(fā)泡塑料、塑料氣墊等。The selection of packaging materials should be right choice according to the characteristics of the builtin objects. 變壓器產(chǎn)品的包裝材料以木質(zhì)材料為主，其材質(zhì)應(yīng)在保證包裝箱強度的前提下，根據(jù)經(jīng)濟環(huán)保原則選用非疫區(qū)的適當樹種。所用實木需熏蒸處理。The board color of same packing case should be consistent. It has the uniform width, flat surface and with no bug and obvious burrs.%，其它部位木材的含水率不大于20%。Each part of box wood allowing defects are shown in table 1 and table 2. Interpretation and calculation methods of various defects in wood, the inclination of the twill calibration method are according to GB/T 155 and GB/T 4823.表1 木材的缺陷限度（滑木、端木、枕木）Table 1 Defects limit of wood (slippery wood, terminal wood, crosstie )缺陷名稱Name of defects 木 材 的 允 許 缺 陷 限 度allowed defects limit of wood滑木、端木、枕木等主要受力構(gòu)件slippery wood, terminal wood, crosstie, etc main stress ponents活節(jié)和死節(jié)Live and dead section 任意材長1000mm中，節(jié)子的個數(shù)不能超過5個，最大節(jié)子直徑不能超過材寬的30%（死節(jié)必須修補），直徑不足5mm的節(jié)子不計。Any material in 1000 mm long, the number of knot is no more than 5, the diameter of biggest knot is no more than 30% of the material width ( Dead knot must be repaired.) Knot with diameter less than 5mm is not counted. Nail parts of slippery wood and crosstie can not have dead knots.腐 朽Decayed不允許 not allowed蟲 孔Wormhole不允許 not allowed裂 紋Crack裂紋長度不得超過材長的20%（寬度不足3mm的裂紋不計），不允許有貫通裂紋Length of crack is no more than 20% of material length ( crack with width less than 3mm is not counted), holethrough crack is not allowed.鈍 棱Wane鈍棱最嚴重的部分缺角寬度不得超過材寬的30%，高度不得超過材厚的三分之一A blunt edge of the most serious part of the missing angle width shall not exceed 30% of the material width. Height should not exceed one third of the material thickness.彎 曲Curve順彎、橫彎不得超過1%，翹彎不得超過2%最大節(jié)子直徑不大于單板寬度30%（每塊箱面只允許一個），脫落節(jié)子需堵實Diameter below 5mm is not counted. The largest diameter of knot is no more than 30% of veneer width (Each box side allows only one). Knot dropped off should be blocked up.最大節(jié)子直徑不大于檔寬25%The largest diameter of knot is no more than 25% of crosspiece width.活 節(jié)Live knot最大節(jié)子直徑不大于單板寬度50%The largest diameter of knot is no more than 25% of veneer width.最大節(jié)子直徑不大于檔寬30%The largest diameter of knot is no more than 30% of crosspiece width.裂 紋Crack裂長不大于板長20%，裂寬不大于2mm，橫裂不許有Note: All defects of knots, on both ends of plate, the pin scope shall n