铜值
- The plating copper is a key process in the production of PCB, which involves the quality assurance of metallization of PTH holes and laminate surface, and is affected by a number of factors.
电镀铜是PCB加工过程中的一个关键工艺流程，涉及到孔和板面金属化的性能保证，影响因素众多。 - Base on studying of properties of the refractory copper ore and a large number of particular tests, the suitable mineral processing flowsheet has been defined.
在研究矿石性质的基础上，通过大量、详细的试验，确定了与该矿相适宜的选别工艺流程。 - The following determinations were made on the initial and aged samples: MIT folding endurance, internal tearing resistance, bursting strength, breaking length, brightness, copper number and average degree of polymerization.
纸张老化前后测试的性能为MIT耐折度、撕裂度、耐破度、裂断长、白度、铜价和聚合度。 - Measurements of folding endurance, internal tearing resistance, brightness, and copper number or average degree of polymerization were strongly recommended for papers before and after accelerating aging.
建议测量纸张老化前后的耐折度、撕裂度、白度和铜价或聚合度。 - The traditional production of copper strips by the process of rod casting wire drawing annealing has a number of drawbacks such as too many work steps, long production period, high cost, product size related to raw materials size etc.
铜扁线加工一直沿用传统的铸杆拉拔退火工艺，其生产工序多、周期长、成本高，原料尺寸与产品规格有关，不利于多品种、小批量的生产模式。 - In the copper wires, with the number of grain boundaries increasing, the resistivity of copper wires increases.
在铜导线中，随晶界数的增加，导线的电阻率增加。 - Describes the impact of tooth parameters of ACR inner-thread copper tube, the number of racks and addendum angle, on its heat transfer and pressure drop performance.
介绍ACR内螺纹铜管齿形参数&齿条数及齿顶角对蒸发单管换热性能及阻力性能的影响。 - Though annealing at different temperatures, the copper wires of the various number of grain boundaries can be obtained.
通过设计不同的退火温度，得到了含不等晶界数的铜导线，以此研究了晶界对导电性的影响。 - Methods Human umbilical cord blood hematopoietic cells were irradiated with copper vapour laser and cultured in vitro. The number of colony and cells was calculated.
方法用铜蒸气激光照射人脐带血造血细胞，体外培养扩增细胞并计数集落细胞数。 - It was observed that samples bleached in neutral region showed maximum copper number, mini-mum tensile strength, minimum degree of polymerization, and greatest potential damage.
可以看出经过近中性范围内漂白的样品铜值最大，强度最低，聚合度最低，并具有最大的潜在损伤。 - In the cyanide gold extraction process, the soluble copper in the ore will cause a large number consumption of cyanide, and affect the gold leaching.
氰化提金过程中，矿石中的可溶性铜会造成***的大量消耗，影响金的浸出。