Dangerous trades as defined in the factories and industrial undertakings ordinance ( cap. 59 ) include boiler chipping ; manufacture of glass from basic raw materials ; manufacturing processes involving the use of arsenic, lead, manganese, mercury and phosphorus ; vermillion manufacture ; chromium plating ; machining or grinding of celluloid or magnesium ; and manufacture of hydrochloric, nitric or sulphuric acids, etc
根據《工廠及工業經營條例》 ，危險行業包括鏟修鍋爐，以基本原料製造玻璃，使用砷、鉛、錳、汞、磷的製造工序，製造硃
砂，鍍
鉻，切削或研磨賽璐珞或鎂，及製造鹽酸、硝酸或硫酸等。
The surface finish for the castings we can provide with are sa the following ; backing. zinc plating. chrome plating and nickel plating for the carbon steel and the low alloy steel castings ; tumbling. hand dull polishing. mirror polishing, electrolytic polishing and passivation treatment for the stainless steel castings and sandblasting. including glass bead blasting. corundum - sand blasting and quartz - sand blasting for all the steel castings
我公司有能力對鑄件表面作如下精整處理，對于碳鋼和低合金鋼，可以作發黑、鍍鋅，鍍
鉻，鍍鎳處理，對于不銹鋼，可作研磨，手工拉絲拋光及鏡面拋光，電拋光，純化處理，所有鋼種可作噴
砂（玻璃
砂，鋼玉
砂，石英
砂）處理。
The surface finish for the castings we can provide with are as the following : blacking, zine plating, chrome plating and nichel plating for the carbon steel and the low alloy steel castings ; tumbling, hand dull polishing, mirror polishing, electrolytic polishing and passivation treatment for the stainless steel castings and sandblasting, including glass bead blasting, corundum - sand blasting and quartz - sand blasting form all the steel castings
我公司有能力對鑄件表面作以下精整處理，對于碳鋼和低合金鋼，可以作發黑、鍍鋅、鍍
鉻、鍍鎳處理；對于不銹鋼，可作研磨、手工拉絲拋光及鏡面拋光、電拋光、鈍化處理；所有鋼種可作噴
砂（玻璃
砂、鋼玉
砂、石英
砂）處理。
According to different backing materials, we can choose the suitable grain size to sanding - blast treating and shape hard chromium plating that isn ' t shaping after being plated, which is the key to solve hard chromium plating like pear ' s skin
根據不同的基材選擇合適的
砂型進行噴
砂處理和鍍后沒有修飾的一次電鍍硬
鉻成型工藝是解決電鍍梨底硬
鉻的關鍵所在。
Midnight chrome brush finish
暗
鉻磨
砂面
The pouring tests of the ladder foam sample were made in silica sand, chromite sand and zircon sand the results show that zircon sand and chromite sand have the better chilling effect, and the structure of the aluminum alloy is finer, the hardness and strength has large improvement, subsequently the investigation provides the reference for manufacturing aluminum alloy thin thickness mold with excellent quality
結果表明，鋯英
砂和
鉻鐵礦
砂具有較好的激冷效果，得到的鋁合金鑄件組織細小，強度、硬度有較大的提高，為薄壁隨型、質量優異的鋁合金消失模模具製造提供了技術依據。
This product combines excellent micro structural flexibility with very good coat ability because of dead burned magnesia / low chromite / hercynite combination
由於重燒鎂
砂和低
鉻鐵礦/鐵鋁尖晶石的組合，該產品結合了優良的微結構彈性和良好的造窯皮能力的優點。
According to some workpieces ' usage demands of the rough degree on the surface of hand chromium plating, through a serial of experiments, we have satisfied the requirements of the using workpieces ' hard chromium layer ' s consistence and rough degree through adding sand - blast treating to the workpieces ' which are not dealt after polishing and adopting some effective control ways to the plating frock and craft, thereby carrying out plating hard chromium like pear ' s skin
摘要根據某些工件對電鍍硬
鉻層表面粗糙度的使用要求，經過一系列的試驗，通過機件毛坯拋光后增加噴
砂處理及時電鍍工裝、工藝採用一些有效的控制手段進行電鍍梨底硬
鉻，滿足了工件使用中對硬
鉻層硬度和粗糙度的要求。
The erosive wear behaviors of five engineering materials, include a3 steel, 1crl8ni9ti stainless steel, high chromium cast iron, ptfe and corundum, were studied by an air blast tester under ambient
採用氣流噴
砂型實驗裝置測試了a _ 3鋼、 1cr18ni9ti不銹鋼、高
鉻鑄鐵、聚四氟乙烯和剛玉五種工程材料的耐沖蝕性能。
Because of the absence of mantle xenoliths and xenocrysts, it is the first time that this paper looks on the native heavy minerals deriving from mantle, which were collected at the terraces of the two rivers, kalakshi river and yulongkashi river, as objects and takes into account the geochemical characteristics of the rocks deriving from mantle such as keliyang lamproite and so on to study the composition of lithospheric mantle, the characterics of palaeozoic era lithospheric mantle, mantle thermal state, and diamond metallogentic mantle geological conditions in research field
為達到研究目的，本文首次以喀拉喀什河和玉龍喀什河沿岸階地的幔源重
砂礦物（單斜輝石、
鉻尖晶石類礦物、鈦鐵礦以及石榴石）為研究對象，結合鉀鎂煌斑巖等區內已發現的幔源巖石及其中地幔物質對該區地幔物質的組成、古生代巖石圈地幔特徵、巖石圈熱狀態以及該區金剛石成礦地幔地質條件做了嘗試性的研究工作。
Low heat dilating rate : it is just this characteristic that make the foundry more precisely, less cracking and high output
熱膨脹率低：熱膨脹率之低與
鉻礦
砂等特殊
砂相同，所以，生產鑄件的尺寸精度高，破裂及表面缺陷少，鑄件成品率高。
Sintered magnesia - chrome materials
燒結鎂
鉻砂
Fused magnesite chrome sinter
電熔鎂
鉻砂
Drainage sand is used in the bottom of ladle. the main specifications of this kind of productions are silica based, magnesia based, chromium based and magnesia olivine based, which can be chosen by the clients
引流
砂是鋼包底部水口填充散狀料，主要品種有硅質、鎂質、
鉻質和鎂橄欖石質等可供客戶選用。
The result showed that it conformed to the actual condition of the field to determine the decomposing and retention rate of the organic material with the method of nylon bag - potassium dichromate, so it ' s suggested that the relative study being performed with the method to replace the method of sand filtration tube - potassium dichromate
結果表明，在潮土區用錦綸袋重鉻酸鉀容量法測定有機物料腐解殘留率更符合田間實際情況，建議用該法替代砂濾管重鉻酸鉀容量法進行相關研究。
