六年级下册第一课开学了。
同学们都返回了学校。
他们的假期过得怎么样,他们过的开心吗, 高伟:你好～凯特。
你的假期过得怎么样,凯特:好极了:我和我的父母去了海南。
高伟:你玩的开心吗,凯特:当然:我们去浏览了三亚。
我们在那儿看见了很多香蕉树、椰子树和花儿。
三亚是座美丽的城市。
我们很喜欢那里。
你也想去那儿吗,高伟:当然。
夏天我会去那儿。
凯特:太棒了:这是彼得的日记。
二月八日我在北京过的春节。
我很开心。
我在春节前夕看电视了。
电视节目很有趣～也很令人兴奋。
那天晚上我们吃了饺子～我喜欢饺子。
我喜欢春节。
我喜欢中国。
temperature piping and equipment, avoid oil pipeline, avoiding vibration equipment, principles of construction of beautiful and neat easy to install. 5.1.5.2 from field instrumentation and valves field junction boxes to the single line slot cable using pipe, 220VAC power cord shall be full pipe laying, indoor coaxial cables concealed and outdoor wear buried. 5.1.5.3 bending cold bending method should be used to protect pipe, bending angle should not be less than 900, when wearing non-armoured cable and laid, bend radius should not be less than 6 times the pipe diameter, when while wearing armored cable and concealed, bend radius should not be less than 10 times the pipe diameter. Bendprotection tube there should be no dents, cracks, single right-angled bend protection tube should not be more than two. 5.1.5.4 between protective tube and between protective tube and connector, threaded connections should be used, it tube end screw thread length should not be less than 1/2 of the fitting, and ensures the electrical connection.5.1.5.5 protection tube should line up, ... 5.1.7 5.1.7.1 check tubing for pressure piping laying pipe, components, materials andspecifications meet the design requirements, and have quality certificates, before laying should be cleared by welding and bending the welding slag, rust, chip or a foreign body, and preservative treatments.5.1.7.2 in pressure piping welding welder must have a valid welder certificate. 5.1.7.3 tubing under the conditions to meet measurement requirements should be as short as possible, General length should not be more than 15m, pipe bending cold bending, cutting machine, minimizing bending and cross, and there shall be no sharp and complex bending, bending radius of not less than 3 times the pipe diameter. 5.1.7.4 pipe and process equipment, piping, or building surface distance is greater than 50mm, not be laid parallel to the oil, combustible, explosive 第二课你假期过得怎么样,好极了。
