成人做爰免费A片视频张悠雨,国产三级片在线观看,偷拍农村妇女BBBBBB视频,77777人妻少妇毛片A片

真空定徑的模具采用螺旋式結(jié)構(gòu)，此結(jié)構(gòu)形式是公司在參照德國巴頓菲爾技術(shù)、吸取試機(jī)實(shí)踐過程中的經(jīng)驗(yàn)及我公司老客戶反饋問題的基礎(chǔ)上，由我公司專業(yè)技術(shù)人員進(jìn)行了多次改進(jìn)，摒棄了以前模具結(jié)構(gòu)的諸多缺點(diǎn)，達(dá)到了各種聚烯烴類新、舊塑料皆能適用，減小了擠出壓力，塑化均勻，高速擠出成型穩(wěn)定，管材各項指標(biāo)均達(dá)到國家標(biāo)準(zhǔn)。結(jié)構(gòu)為新型烯烴類組合式，管材壁厚均勻，內(nèi)外平滑，無凹凸或疤痕，定型更穩(wěn)定，尺寸更準(zhǔn)確.
The vacuum sizing die adopts the spiral structure, which is based on the company's experience in the process of trial production and the feedback from our old customers. The professional technicians of our company have made many improvements and abandoned many shortcomings of the former die structure, so that all kinds of new and old polyolefin plastics can be applied and reduced Small extrusion pressure, uniform plasticization, stable high-speed extrusion, all the indexes of the pipe meet the national standards. The structure is a new type of olefin combination type, with uniform wall thickness, smooth inside and outside, no bump or scar, more stable setting and more accurate size